bpo-46785: Fix race condition between os.stat() and unlink on Windows (GH-31858)

* [3.9] bpo-46785: Fix race condition between os.stat() and unlink on Windows (GH-31858).
(cherry picked from commit 39e6b8ae)

Co-authored-by: Itai Steinherz <itaisteinherz@gmail.com>