Default to `StartProxyRemoveUnusedRegistries` behaviour #8211

Job	Run time
Ruby analysis (macos-latest, nightly-latest)	1m 9s
Ruby analysis (macos-latest, default)	1m 17s
Ruby analysis (macos-latest, linked)	1m 5s
Ruby analysis (ubuntu-latest, linked)	45s
Ruby analysis (ubuntu-latest, nightly-latest)	46s
Ruby analysis (ubuntu-latest, default)	38s
	5m 40s

Provide feedback