Fix type error for sys._is_gil_enabled in tests

Amp-Thread-ID: https://ampcode.com/threads/T-a444a23f-4bec-49e7-8aba-c1ab93406ffb
Co-authored-by: Amp <[email protected]>

Author: vinitkumar

tests/test_parallel.py

@@ -32,13 +32,13 @@ def test_is_free_threaded_exception(self) -> None:
         original = getattr(sys, '_is_gil_enabled', None)
         def mock_is_gil_enabled():
             raise Exception("test")
-        sys._is_gil_enabled = mock_is_gil_enabled
+        sys._is_gil_enabled = mock_is_gil_enabled  # type: ignore
         try:
             result = is_free_threaded()
             assert result is False  # defaults to False on exception
         finally:
             if original is not None:
-                sys._is_gil_enabled = original
+                sys._is_gil_enabled = original  # type: ignore
             else:
                 delattr(sys, '_is_gil_enabled')