gh-152298: Fix LazyImportType.resolve reification

[Kuhai9801]

Make types.LazyImportType.resolve() cache successful reification and replace the original module global only when it still points at the same lazy proxy.

The tests cover cached resolves, stale/rebound/deleted globals, retry after failure, module attribute reification, copied proxies, and reentrant store handling.

Tests:

• git diff --check
• GitHub Actions required checks after squash

• Issue: LazyImportType.resolve() does not replace the module global and can import twice #152298

[python-cla-bot]

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[read-the-docs-community]

Documentation build overview

📚 cpython-previews | 🛠️ Build #33342023 | 📁 Comparing ad578bc against main (1812162)

  🔍 Preview build  

18 files changed · ± 17 modified · - 1 deleted

± Modified

• c-api/type.html
• deprecations/pending-removal-in-3.16.html
• library/asyncio-eventloop.html
• library/asyncio-llapi-index.html
• library/asyncio-runner.html
• library/asyncio.html
• library/curses.html
• library/itertools.html
• library/tkinter.html
• library/tkinter.messagebox.html
• and 7 more...

- Deleted

• library/asyncio-policy.html