Implement dumping of processed sarif file #4945

Job	Run time
Diagnostic export (ubuntu-latest, linked)	1m 2s
Diagnostic export (macos-latest, nightly-latest)	1m 3s
Diagnostic export (windows-latest, nightly-latest)	2m 48s
Diagnostic export (windows-latest, linked)	2m 44s
Diagnostic export (macos-latest, linked)	1m 17s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 5s
	9m 59s

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