GH-101357: Suppress `OSError` from `pathlib.Path.exists()` and `is_*()` (#118243)

Suppress all `OSError` exceptions from `pathlib.Path.exists()` and `is_*()`
rather than a selection of more common errors as we do presently. Also
adjust the implementations to call `os.path.exists()` etc, which are much
faster on Windows thanks to GH-101196.