Fix torch cpp extension build warnings (#19842)

### Fix torch cpp extension build warnings

For the warnings shown as below: 

```
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
[4/5] c++ -MMD -MF /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_bw.o.d -pthread -B /opt/conda/envs/ptca/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/api/include -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/TH -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/THC -I/opt/conda/envs/ptca/include/python3.8 -c -c /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_bw.cc -o /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_bw.o -O3 -std=c++17 -DTORCH_API_INCLUDE_EXTENSION_H '-DPYBIND11_COMPILER_TYPE="_gcc"' '-DPYBIND11_STDLIB="_libstdcpp"' '-DPYBIND11_BUILD_ABI="_cxxabi1011"' -DTORCH_EXTENSION_NAME=torch_interop_utils -D_GLIBCXX_USE_CXX11_ABI=0
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
In file included from /opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/utils/python_arg_parser.h:65,
                 from /opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/utils/tensor_new.h:4,
                 from /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_bw.cc:9:
/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/utils/python_strings.h:104:19: warning: ‘pybind11::object PyObject_FastGetAttrString(PyObject*, const char*)’ defined but not used [-Wunused-function]
  104 | static py::object PyObject_FastGetAttrString(PyObject* obj, const char* name) {
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~
[5/5] c++ -MMD -MF /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_fw.o.d -pthread -B /opt/conda/envs/ptca/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/api/include -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/TH -I/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/THC -I/opt/conda/envs/ptca/include/python3.8 -c -c /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_fw.cc -o /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_fw.o -O3 -std=c++17 -DTORCH_API_INCLUDE_EXTENSION_H '-DPYBIND11_COMPILER_TYPE="_gcc"' '-DPYBIND11_STDLIB="_libstdcpp"' '-DPYBIND11_BUILD_ABI="_cxxabi1011"' -DTORCH_EXTENSION_NAME=torch_interop_utils -D_GLIBCXX_USE_CXX11_ABI=0
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
In file included from /opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/utils/python_arg_parser.h:65,
                 from /opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/utils/tensor_new.h:4,
                 from /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_fw.cc:13:
/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/include/torch/csrc/utils/python_strings.h:104:19: warning: ‘pybind11::object PyObject_FastGetAttrString(PyObject*, const char*)’ defined but not used [-Wunused-function]
  104 | static py::object PyObject_FastGetAttrString(PyObject* obj, const char* name) {
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~
g++ -pthread -B /opt/conda/envs/ptca/compiler_compat -Wl,--sysroot=/ -pthread -shared -B /opt/conda/envs/ptca/compiler_compat -L/opt/conda/envs/ptca/lib -Wl,-rpath=/opt/conda/envs/ptca/lib -Wl,--no-as-needed -Wl,--sysroot=/ /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/ctx_pool.o /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_bw.o /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_fw.o /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_shared.o /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/temp.linux-x86_64-cpython-38/opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/torch_interop_utils.o -L/opt/conda/envs/ptca/lib/python3.8/site-packages/torch/lib -lc10 -ltorch -ltorch_cpu -ltorch_python -o build/lib.linux-x86_64-cpython-38/torch_interop_utils.cpython-38-x86_64-linux-gnu.so
Installing /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/lib.linux-x86_64-cpython-38/fused_ops.cpython-38-x86_64-linux-gnu.so -> /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/fused_ops.cpython-38-x86_64-linux-gnu.so
Installing /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/lib.linux-x86_64-cpython-38/aten_op_executor.cpython-38-x86_64-linux-gnu.so -> /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/aten_op_executor.cpython-38-x86_64-linux-gnu.so
Installing /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/lib.linux-x86_64-cpython-38/torch_gpu_allocator.cpython-38-x86_64-linux-gnu.so -> /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/torch_gpu_allocator.cpython-38-x86_64-linux-gnu.so
Installing /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/build/lib.linux-x86_64-cpython-38/torch_interop_utils.cpython-38-x86_64-linux-gnu.so -> /opt/conda/envs/ptca/lib/python3.8/site-packages/onnxruntime/training/ortmodule/torch_cpp_extensions/torch_interop_utils.cpython-38-x86_64-linux-gnu.so

```

Fix by replacing eixsting `PyObject_GetAttrString` with
`PyObject_FastGetAttrString` which claims to be faster in its
implementation comment.

### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->

orttraining/orttraining/core/optimizer/memory_optimizer/memory_optimizer.cc

@@ -31,7 +31,6 @@ constexpr bool IsForwardPassOperator(ptrdiff_t op_order_in_topological_sort,
 // Reset seed attribute for the dropout node if the seed is not set.
 bool SetSeedForDropoutNode(Node& node) {
   // ONNX Dropout 1, 6, 7, 10 do not have seed attribute, so we remove them from the recompute support.
-  // TODO(pengwa): add the opset check in GetAllowedRecomputeOps.
   if (graph_utils::IsSupportedOptypeVersionAndDomain(node, "Dropout", {12, 13}, kOnnxDomain) ||
       graph_utils::IsSupportedOptypeVersionAndDomain(node, "BitmaskDropout", {1}, kMSDomain) ||
       graph_utils::IsSupportedOptypeVersionAndDomain(node, "BiasDropout", {1}, kMSDomain) ||

orttraining/orttraining/python/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_bw.cc

@@ -60,9 +60,10 @@ std::vector<PyObject*> custom_function_backward_runner(const char* func_name_cha
         tensor = torch::utils::tensor_fromDLPack(args[arg_index]);
       } else {
         TORCH_CHECK(args[arg_index] == Py_None, "Only None is supported for non-tensor input.");
-        PyObject* fw_kernel_invoke_id = PyObject_GetAttrString(ctx.ptr(), "fw_kernel_invoke_id");
+        py::object fw_kernel_invoke_id = PyObject_FastGetAttrString(ctx.ptr(), "fw_kernel_invoke_id");
+        TORCH_CHECK(fw_kernel_invoke_id.ptr() != nullptr, "fw_kernel_invoke_id is not found in the context.");
         std::string fw_kernel_invoke_id_str =
-            py::cast<std::string>(py::reinterpret_borrow<py::object>(fw_kernel_invoke_id));
+            py::cast<std::string>(fw_kernel_invoke_id);
         CustomFuncOpKernelInfo& fw_kernel_info =
             KernelInfoStore::GetInstance().GetKernelInfoMap().at(fw_kernel_invoke_id_str);
         if (fw_kernel_info.materialize_grads) {

orttraining/orttraining/python/training/ortmodule/torch_cpp_extensions/cpu/torch_interop_utils/custom_function_fw.cc

@@ -255,7 +255,7 @@ static py::object get_mockup_context_class() {
       throw std::runtime_error("Fails to import the module.");
     }
 
-    auto python_class = py::reinterpret_steal<py::object>(PyObject_GetAttrString(module.ptr(), "FakeContext"));
+    auto python_class = PyObject_FastGetAttrString(module.ptr(), "FakeContext");
     if (!PyCallable_Check(python_class.ptr())) {
       throw std::runtime_error("Cannot instantiate the Python class");
     }