Testing: Provide default value for more environment variables in `setupActionsVars` #7160

Job	Run time
Ruby analysis (ubuntu-latest, linked)	48s
Ruby analysis (macos-latest, linked)	52s
Ruby analysis (ubuntu-latest, nightly-latest)	49s
Ruby analysis (macos-latest, nightly-latest)	1m 7s
Ruby analysis (ubuntu-latest, default)	45s
Ruby analysis (macos-latest, default)	1m 10s
	5m 31s

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