test

network: Add PyPIAttestationAvailableCheck #1927

Job	Run time
lint	35s
format	4s
test (ubuntu-latest, 3.12, newest-deps, false)	3m 43s
test (ubuntu-latest, 3.14-dev, newest-deps, true)	4m 51s
test (ubuntu-latest, 3.11, newest-deps, false)	5m 22s
test (ubuntu-latest, 3.13, minimal-deps, false)	5m 12s
test (macos-latest, 3.13, newest-deps, true)	5m 44s
test (ubuntu-latest, 3.13, newest-deps, false)	5m 2s
	30m 33s

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