PR checks: support collections of workflows #7427

Job	Run time
Packaging: Config file (windows-latest, default)	3m 59s
Packaging: Config file (ubuntu-latest, default)	1m 14s
Packaging: Config file (macos-latest, default)	1m 19s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 33s
Packaging: Config file (macos-latest, nightly-latest)	1m 14s
Packaging: Config file (windows-latest, nightly-latest)	4m 5s
Packaging: Config file (ubuntu-latest, linked)	1m 19s
Packaging: Config file (windows-latest, linked)	3m 34s
Packaging: Config file (macos-latest, linked)	1m 12s
	19m 29s

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