PR checks: support collections of workflows #4692

Job	Run time
Diagnostic export (ubuntu-latest, nightly-latest)	1m 5s
Diagnostic export (windows-latest, linked)	2m 52s
Diagnostic export (windows-latest, nightly-latest)	3m 14s
Diagnostic export (ubuntu-latest, linked)	1m 6s
Diagnostic export (macos-latest, nightly-latest)	1m 10s
Diagnostic export (macos-latest, linked)	1m 48s
	11m 15s

Provide feedback