Fix cached lookup filepath on windows for hub (#19178)

* Update hub.py commit_hash extraction

Add safety mechanism for windows systems to unify logic (replace double backslashes with /)

* Fix string quotetype

* Aaaa circleci is messing with me.

* Switch to using as_posix() method from pathlib

* Update src/transformers/utils/hub.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* Update src/transformers/utils/hub.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

src/transformers/utils/hub.py

@@ -222,7 +222,7 @@ def extract_commit_hash(resolved_file: Optional[str], commit_hash: Optional[str]
     """
     if resolved_file is None or commit_hash is not None:
         return commit_hash
-
+    resolved_file = str(Path(resolved_file).as_posix())
     search = re.search(r"snapshots/([^/]+)/", resolved_file)
     if search is None:
         return None