Update pytest `import_path` location (#29154)

* Update to pull function from proper lib

* Fix ruff formatting error

* Remove accidently added file

src/transformers/testing_utils.py

@@ -137,9 +137,9 @@ if is_pytest_available():
         _is_mocked,
         _patch_unwrap_mock_aware,
         get_optionflags,
-        import_path,
     )
     from _pytest.outcomes import skip
+    from _pytest.pathlib import import_path
     from pytest import DoctestItem
 else:
     Module = object