Support requesting latest nightly with `tools: nightly` #5740

Job	Run time
Ruby analysis (macos-latest, nightly-latest)	1m 10s
Ruby analysis (macos-latest, default)	59s
Ruby analysis (ubuntu-latest, nightly-latest)	49s
Ruby analysis (macos-latest, linked)	1m 2s
Ruby analysis (ubuntu-latest, linked)	52s
Ruby analysis (ubuntu-latest, default)	46s
	5m 38s

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