gh-116811: Ensure MetadataPathFinder.invalidate_caches is reachable when delegated through PathFinder. (#116812)

* Make MetadataPathFinder a proper classmethod.

* In PathFinder.invalidate_caches, also invoke MetadataPathFinder.invalidate_caches.

* Add blurb

Jason R. Coombs committed 2y ago

5f52d20a93908196f74271db8437cc1ba7e1e262

Parent: be59aaf

Committed by GitHub <noreply@github.com> on 3/14/2024, 9:59:00 PM