Support requesting latest version from toolcache with `tools: toolcache` #7966

Job	Run time
Split workflow (ubuntu-latest, linked)	1m 14s
Split workflow (ubuntu-latest, default)	1m 23s
Split workflow (macos-latest, linked)	1m 56s
Split workflow (ubuntu-latest, nightly-latest)	1m 21s
Split workflow (macos-latest, nightly-latest)	1m 35s
Split workflow (macos-latest, default)	1m 49s
	9m 18s

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