Improve logs for combined SARIF debug artifact #3754

Job	Run time
Diagnostic export (ubuntu-latest, linked)	1m 17s
Diagnostic export (macos-latest, linked)	1m 44s
Diagnostic export (windows-latest, linked)	2m 54s
Diagnostic export (windows-latest, nightly-latest)	5m 16s
Diagnostic export (ubuntu-latest, nightly-latest)	59s
Diagnostic export (macos-latest, nightly-latest)	1m 11s
	13m 21s

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