Support requesting latest version from toolcache with `tools: toolcache` #7995

Job	Run time
Split workflow (ubuntu-latest, default)	1m 35s
Split workflow (ubuntu-latest, linked)	2m 44s
Split workflow (macos-latest, nightly-latest)	1m 37s
Split workflow (macos-latest, linked)	1m 22s
Split workflow (ubuntu-latest, nightly-latest)	1m 25s
Split workflow (macos-latest, default)	1m 17s
	10m 0s

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