Use pylibcudf.strings.convert.convert_integers.is_integer in cudf p…

…ython (#17270)

Apart of #15162

Authors:
  - Matthew Murray (https://github.com/Matt711)

Approvers:
  - Matthew Roeschke (https://github.com/mroeschke)

URL: #17270

python/cudf/cudf/_lib/strings/convert/convert_integers.pyx

@@ -1,15 +1,8 @@
 # Copyright (c) 2021-2024, NVIDIA CORPORATION.
 
-from libcpp.memory cimport unique_ptr
-from libcpp.utility cimport move
-
 from cudf.core.buffer import acquire_spill_lock
 
-from pylibcudf.libcudf.column.column cimport column
-from pylibcudf.libcudf.column.column_view cimport column_view
-from pylibcudf.libcudf.strings.convert.convert_integers cimport (
-    is_integer as cpp_is_integer,
-)
+import pylibcudf as plc
 
 from cudf._lib.column cimport Column
 
@@ -20,12 +13,8 @@ def is_integer(Column source_strings):
     Returns a Column of boolean values with True for `source_strings`
     that have integers.
     """
-    cdef unique_ptr[column] c_result
-    cdef column_view source_view = source_strings.view()
-
-    with nogil:
-        c_result = move(cpp_is_integer(
-            source_view
-        ))
-
-    return Column.from_unique_ptr(move(c_result))
+    return Column.from_pylibcudf(
+        plc.strings.convert.convert_integers.is_integer(
+            source_strings.to_pylibcudf(mode="read")
+        )
+    )