Merge remote-tracking branch 'bdraco/thread_to_asyncio_slow' into thread_to_asyncio_slow

Author: bdraco

Misc/NEWS.d/next/Library/2025-05-18-07-25-15.gh-issue-134173.53oOoF.rst

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+Add ``_get_snapshot()`` method to :class:`concurrent.futures.Future` to
+atomically retrieve all future state in a single lock acquisition. This speeds
+up :mod:`asyncio`'s ``_copy_future_state()`` by up to 4x when transferring state
+from :class:`concurrent.futures.Future` to :class:`asyncio.Future`. Patch by J. Nick Koston.