Basic support for overlay PR analysis #4393

Job	Run time
Diagnostic export (macos-latest, linked)	1m 35s
Diagnostic export (windows-latest, linked)	3m 10s
Diagnostic export (ubuntu-latest, linked)	1m 7s
Diagnostic export (windows-latest, nightly-latest)	3m 18s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 7s
Diagnostic export (macos-latest, nightly-latest)	1m 15s
	11m 32s

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