[3.12] gh-113238: add Anchor to importlib.resources

[mikeziminio]

• Issue: Cannot import Anchor from importlib.resources #113238

[ghost]

All commit authors signed the Contributor License Agreement.

[bedevere-app]

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[hugovk]

PRs should be made against the main branch, and then we have a friendly bot to backport to older version branches.

Please could you close and re-open this against main?

(DO NOT change the base branch of this PR or you'll end up accidentally pinging dozens of CODEOWNERS :)