Backports from `anyio` (old `main`) branch to `main` branch #3424

Job	Run time
test_docs	38s
Test Prereleases	2m 19s
Test Minimum Versions	2m 46s
Make SDist	24s
Test Lint	59s
test_without_debugpy (ubuntu-latest, 3.9)	2m 12s
check_release	1m 36s
link_check	3m 33s
build (ubuntu-latest, 3.9)	4m 56s
build (ubuntu-latest, pypy-3.10)	3m 57s
build (windows-latest, 3.12)	8m 42s
build (ubuntu-latest, 3.11)	5m 6s
build (windows-latest, 3.11)	8m 36s
build (windows-latest, pypy-3.10)	7m 8s
build (windows-latest, 3.9)	6m 53s
build (windows-latest, 3.13)	7m 22s
build (ubuntu-latest, 3.12)	6m 5s
build (ubuntu-latest, 3.10)	4m 50s
build (macos-latest, 3.10)	4m 55s
build (ubuntu-latest, 3.13)	5m 1s
build (macos-latest, 3.12)	6m 18s
build (macos-latest, 3.11)	4m 34s
build (macos-latest, 3.13)	4m 59s
build (windows-latest, 3.10)	8m 27s
build (macos-latest, pypy-3.10)	4m 51s
build (macos-latest, 3.9)	5m 13s
Install from SDist and Test	2m 14s
coverage	16s
	2h 4m 50s

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