Support requesting latest nightly with `tools: nightly` #6325

Job	Run time
Packaging: Config and input passed to the CLI (macos-latest, linked)	2m 18s
Packaging: Config and input passed to the CLI (macos-latest, default)	2m 2s
Packaging: Config and input passed to the CLI (windows-latest, default)	1m 39s
Packaging: Config and input passed to the CLI (ubuntu-latest, nightly-latest)	1m 18s
Packaging: Config and input passed to the CLI (ubuntu-latest, default)	2m 11s
Packaging: Config and input passed to the CLI (ubuntu-latest, linked)	1m 13s
Packaging: Config and input passed to the CLI (windows-latest, linked)	5m 22s
Packaging: Config and input passed to the CLI (macos-latest, nightly-latest)	2m 1s
Packaging: Config and input passed to the CLI (windows-latest, nightly-latest)	4m 35s
Packaging: Config and input passed to the CLI (ubuntu-latest, linked)	1m 13s
Packaging: Config and input passed to the CLI (ubuntu-latest, default)	2m 11s
Packaging: Config and input passed to the CLI (windows-latest, linked)	5m 22s
Packaging: Config and input passed to the CLI (macos-latest, linked)	2m 18s
Packaging: Config and input passed to the CLI (macos-latest, default)	2m 2s
Packaging: Config and input passed to the CLI (macos-latest, nightly-latest)	2m 1s
Packaging: Config and input passed to the CLI (ubuntu-latest, nightly-latest)	1m 18s
Packaging: Config and input passed to the CLI (windows-latest, default)	6m 46s
Packaging: Config and input passed to the CLI (windows-latest, nightly-latest)	4m 35s
	50m 25s

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