Support requesting latest nightly with `tools: nightly` #7805

Job	Run time
Packaging: Config and input (ubuntu-latest, linked)	1m 29s
Packaging: Config and input (macos-latest, linked)	1m 35s
Packaging: Config and input (windows-latest, linked)	3m 28s
Packaging: Config and input (ubuntu-latest, default)	1m 15s
Packaging: Config and input (macos-latest, default)	2m 6s
Packaging: Config and input (windows-latest, default)	3m 25s
Packaging: Config and input (windows-latest, nightly-latest)	4m 5s
Packaging: Config and input (ubuntu-latest, nightly-latest)	1m 43s
Packaging: Config and input (macos-latest, nightly-latest)	1m 28s
	20m 34s

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