* Reapply "gh-132947: Apply changes from importlib_metadata 8.7 (#137885)" (#137924)
This reverts commit 3706ef66ef.
* Skip the triggering test on buildbots only.
* Sync with importlib_metadata 8.2.0
Removes deprecated behaviors, including support for `PackageMetadata.__getitem__` returning None for missing keys and Distribution subclasses not implementing abstract methods.
Prioritizes valid dists to invalid dists when retrieving by name (python/cpython/#120492). Adds SimplePath to `importlib.metadata.__all__`.
* Add blurb
* Ensure importlib.metadata tests do not leak references in sys.modules.
* Move importlib.metadata tests to their own package for easier syncing with importlib_metadata.
* Update owners and makefile for new directories.
* Add blurb
