Ensure artifacts are only uploaded in safe situations #3653

Job	Run time
Diagnostic export (macos-latest, nightly-latest)	1m 7s
Diagnostic export (ubuntu-latest, linked)	1m 2s
Diagnostic export (windows-latest, nightly-latest)	4m 10s
Diagnostic export (ubuntu-latest, nightly-latest)	56s
Diagnostic export (windows-latest, linked)	3m 43s
Diagnostic export (macos-latest, linked)	1m 20s
	12m 18s

Provide feedback