Disable 3 failing downstream tests, but keep testing the rest. #3026

Job	Run time
Test Lint	55s
build (ubuntu-latest, 3.9)	2m 49s
build (ubuntu-latest, 3.13)	2m 54s
check_release	1m 55s
test_docs	36s
build (windows-latest, 3.9)	5m 0s
Test Minimum Versions	2m 13s
Test Prereleases	2m 10s
build (windows-latest, 3.13)	4m 32s
build (macos-latest, 3.9)	2m 57s
test_without_debugpy (ubuntu-latest, 3.9)	1m 54s
build (macos-latest, 3.13)	3m 15s
build (ubuntu-latest, pypy-3.9)	4m 23s
link_check	1m 42s
build (macos-latest, 3.10)	2m 51s
Make SDist	26s
build (ubuntu-latest, 3.11)	2m 40s
build (ubuntu-latest, 3.12)	3m 8s
Install from SDist and Test	1m 58s
coverage	0s
	48m 18s

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