tests

Restore `pkg_resources` #6968

Job	Run time
Fail the job if files changed under _disutils/_vendor folders	8s
collateral (diffcov)	3m 26s
test_cygwin (39, windows-latest)	14m 0s
collateral (docs)	2m 21s
test (>=3.13.5, ubuntu-latest)	3m 43s
test (3.9, macos-latest)	7m 57s
test (3.11, ubuntu-latest)	3m 0s
test (3.9, windows-latest)	9m 15s
test (3.9, ubuntu-latest)	3m 54s
test (>=3.13.5, macos-latest)	3m 58s
test (3.14, ubuntu-latest)	3m 51s
test (>=3.13.5, windows-latest)	8m 2s
test (ubuntu-latest, 3.10, stdlib)	3m 29s
test (3.10, ubuntu-latest)	3m 31s
test (pypy3.10, ubuntu-latest, stdlib)	12m 24s
test (3.12, ubuntu-latest)	3m 41s
integration-test	-1s
check	4s
release	-1s
	1h 26m 42s

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