Suggest to make implementations of some function always return awaitable #2940

Job	Run time
test_docs	36s
build (ubuntu-latest, 3.9)	15m 24s
build (ubuntu-latest, 3.13)	15m 24s
check_release	1m 50s
build (windows-latest, 3.9)	8m 32s
link_check	3m 17s
Make SDist	24s
build (windows-latest, 3.13)	8m 20s
Test Lint	51s
Test Minimum Versions	2m 11s
build (macos-latest, 3.9)	15m 39s
build (macos-latest, 3.13)	15m 27s
build (ubuntu-latest, pypy-3.9)	4m 36s
test_without_debugpy (ubuntu-latest, 3.9)	1m 53s
Test Prereleases	2m 0s
build (macos-latest, 3.10)	15m 39s
build (ubuntu-latest, 3.11)	15m 23s
build (ubuntu-latest, 3.12)	15m 25s
Install from SDist and Test	20m 14s
coverage	0s
tests_check	3s
	2h 43m 8s

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