Stub out os.stat raises exception when run with pytest

[ivancrneto]

1. Create a minimum testcase

import mox
import os

class TestExample:
    def test_stat(self):
        mock = mox.Mox()
        mock.stubout(os, 'stat')
        stat = mock.create_mock_anything()
        os.stat('a').returns(stat)

        mock.replay_all()
        print(os.stat('a'))
        mock.verify_all()
        mock.unset_stubs()

2. pytest
3. Exception is raised because pytest is using os.stat, which is stubbed out

  File "/home/user/.pyenv/versions/3.12.1/lib/python3.12/pathlib.py", line 840, in stat
    return os.stat(self, follow_symlinks=follow_symlinks)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/projects/pymox/mox/mox.py", line 851, in __call__
    return mock_method(*params, **named_params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/projects/pymox/mox/mox.py", line 1159, in __call__
    expected_method = self._verify_method_call()
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/projects/pymox/mox/mox.py", line 1209, in _verify_method_call
    expected = self._pop_next_method()
               ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/projects/pymox/mox/mox.py", line 1195, in _pop_next_method
    raise exception
mox.exceptions.UnexpectedMethodCallError: Unexpected method call builtin_function_or_method.__call__(PosixPath('...'), follow_symlinks=True) -> None