Backports and extra changes to fix CI on 6.x branch #3253

Job	Run time
Test Lint	53s
check_release	1m 35s
build (ubuntu-latest, 3.9)	2m 59s
link_check	3m 19s
build (ubuntu-latest, 3.12)	3m 14s
build (windows-latest, 3.9)	8m 4s
Make SDist	30s
test_docs	38s
build (windows-latest, 3.12)	7m 30s
Test Minimum Versions	2m 5s
build (macos-latest, 3.9)	4m 47s
build (macos-latest, 3.12)	4m 37s
Test Prereleases	1m 52s
build (ubuntu-latest, pypy-3.9)	2m 47s
test_without_debugpy (ubuntu-latest, 3.9)	1m 51s
build (macos-latest, 3.10)	4m 26s
build (ubuntu-latest, 3.11)	3m 5s
Install from SDist and Test	1m 46s
coverage	15s
tests_check	1s
	56m 14s

Provide feedback