PR checks: support collections of workflows #4286

Job	Run time
Resolve environment (macos-latest, default)	1m 38s
Resolve environment (windows-latest, linked)	2m 30s
Resolve environment (macos-latest, nightly-latest)	1m 42s
Resolve environment (ubuntu-latest, linked)	38s
Resolve environment (ubuntu-latest, nightly-latest)	41s
Resolve environment (windows-latest, nightly-latest)	4m 38s
Resolve environment (ubuntu-latest, default)	41s
Resolve environment (windows-latest, default)	2m 13s
Resolve environment (macos-latest, linked)	2m 10s
	16m 51s

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