ASAN: fix heap-buffer-overflow (pytorch#101970)

Pass size argument.

<details>
<summary>ASAN report</summary>

```
==1640574==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x609000022160 at pc 0x03ff31a04b42 bp 0x03ff69885dc0 sp 0x03ff69885db0
READ of size 16 at 0x609000022160 thread T1
    #0 0x3ff31a04b41 in at::vec::ZVECTOR::Vectorized<unsigned char, void>::loadu(void const*, int) /home/user/pytorch/aten/src/ATen/cpu/vec/vec256/zarch/vec256_zarch.h:397
    #1 0x3ff31a04b41 in at::vec::ZVECTOR::Vectorized<c10::quint8, void>::loadu(void const*, int) /home/user/pytorch/aten/src/ATen/cpu/vec/vec256/zarch/vec256_zarch.h:1574
    #2 0x3ff31a04b41 in operator() /home/user/pytorch/aten/src/ATen/native/quantized/cpu/kernels/QuantizedOpKernels.cpp:2668
    #3 0x3ff31cefa5d in void at::internal::invoke_parallel<at::native::(anonymous namespace)::quantized_normalize_kernel(at::Tensor const&, at::Tensor const&, at::Tensor const&, bool, int, int, long, long
, double, at::Tensor*)::{lambda()#1}::operator()() const::{lambda()#2}::operator()() const::{lambda(long, long)#1}>(long, long, long, at::native::(anonymous namespace)::quantized_normalize_kernel(at::Tens
or const&, at::Tensor const&, at::Tensor const&, bool, int, int, long, long, double, at::Tensor*)::{lambda()#1}::operator()() const::{lambda()#2}::operator()() const::{lambda(long, long)#1} const&) [clone
 ._omp_fn.0] /home/user/pytorch/aten/src/ATen/ParallelOpenMP.h:42
    #4 0x3ff6f31f52d in gomp_thread_start /var/tmp/portage/sys-devel/gcc-12.2.1_p20230304/work/gcc-12-20230304/libgomp/team.c:129
    #5 0x3ff82218381 in start_thread /usr/src/debug/sys-libs/glibc-2.37-r1/glibc-2.37/nptl/pthread_create.c:444
    pytorch#6 0x3ff822943f1  (/lib64/libc.so.6+0x1143f1)

0x609000022160 is located 0 bytes to the right of 32-byte region [0x609000022140,0x609000022160)
allocated by thread T0 here:
    #0 0x3ff82a3663f in __interceptor_posix_memalign /usr/src/debug/sys-devel/gcc-11.3.1_p20230303/gcc-11-20230303/libsanitizer/asan/asan_malloc_linux.cpp:226
    #1 0x3ff6f53ad95 in c10::alloc_cpu(unsigned long) /home/user/pytorch/c10/core/impl/alloc_cpu.cpp:74

Thread T1 created by T0 here:
    #0 0x3ff829dc263 in __interceptor_pthread_create /usr/src/debug/sys-devel/gcc-11.3.1_p20230303/gcc-11-20230303/libsanitizer/asan/asan_interceptors.cpp:216
    #1 0x3ff6f31fad5 in gomp_team_start /var/tmp/portage/sys-devel/gcc-12.2.1_p20230304/work/gcc-12-20230304/libgomp/team.c:858

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/pytorch/aten/src/ATen/cpu/vec/vec256/zarch/vec256_zarch.h:397 in at::vec::ZVECTOR::Vectorized<unsigned char, void>::loadu(void const*, int)
Shadow bytes around the buggy address:
  0x100c12000043d0: 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x100c12000043e0: fd fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x100c12000043f0: fd fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x100c1200004400: fd fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x100c1200004410: fa fa fa fa fa fa fa fa fd fa fa fa fa fa fa fa
=>0x100c1200004420: fa fa fa fa fa fa fa fa 00 00 00 00[fa]fa fa fa
  0x100c1200004430: fa fa fa fa fa fa fa fa fd fd fa fa fa fa fa fa
  0x100c1200004440: fa fa fa fa fa fa fa fa fd fd fa fa fa fa fa fa
  0x100c1200004450: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x100c1200004460: 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x100c1200004470: 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
  Shadow gap:              cc
==1640574==ABORTING
```
</details>

Pull Request resolved: pytorch#101970
Approved by: https://github.com/Skylion007, https://github.com/jgong5

aten/src/ATen/cpu/vec/vec256/zarch/vec256_zarch.h

@@ -1554,11 +1554,11 @@ struct Vectorized<T, std::enable_if_t<is_zarch_implemented_quant<T>()>> {
 
   static Vectorized<T> C10_ALWAYS_INLINE
   loadu(const void* ptr, int count = size()) {
-    return Vectorized<T>{vinner_type::loadu(ptr)};
+    return Vectorized<T>{vinner_type::loadu(ptr, count)};
   }
 
   void C10_ALWAYS_INLINE store(void* ptr, int count = size()) const {
-    _vec.store(ptr);
+    _vec.store(ptr, count);
   }
 
   Vectorized<T> relu(Vectorized<T> zero_point) const {