Cleanup extract to toolcache feature flag #4653

Job	Run time
Diagnostic export (windows-latest, linked)	2m 54s
Diagnostic export (windows-latest, nightly-latest)	3m 32s
Diagnostic export (macos-latest, linked)	1m 6s
Diagnostic export (ubuntu-latest, linked)	1m 5s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 9s
Diagnostic export (macos-latest, nightly-latest)	1m 29s
	11m 15s

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