[3.10] gh-92417: `asyncio` docs: `asyncio.run()` is available on all supported Python versions (GH-92419) (GH-92463)



(cherry picked from commit f4e317b304c7f86e48885b4b74c7a8826648922c)


Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Automerge-Triggered-By: GH:serhiy-storchaka