refactor: install clang tools on demand #607

Job	Run time
Build FreeBSD	4m 11s
Build i686-pc-windows-msvc	4m 51s
Build x86_64-unknown-linux-musl	3m 43s
Build x86_64-apple-darwin	4m 17s
Build aarch64-pc-windows-msvc	5m 1s
Build aarch64-apple-darwin	3m 31s
Build armv7-unknown-linux-gnueabihf	3m 33s
Build x86_64-pc-windows-msvc	4m 48s
Build x86_64-unknown-linux-gnu	3m 23s
Build aarch64-unknown-linux-musl	3m 34s
Build aarch64-unknown-linux-gnu	3m 28s
Test aarch64-pc-windows-msvc - node@22	49s
Test aarch64-apple-darwin - node@22	20s
Test aarch64-apple-darwin - node@20	24s
Test aarch64-unknown-linux-gnu - node@20	34s
Test x86_64-pc-windows-msvc - node@20	40s
Test x86_64-unknown-linux-gnu - node@22	13s
Test x86_64-apple-darwin - node@22	56s
Test x86_64-unknown-linux-musl - node@22	27s
Test x86_64-apple-darwin - node@20	57s
Test x86_64-unknown-linux-gnu - node@20	16s
Test aarch64-unknown-linux-musl - node@20	42s
Test armv7-unknown-linux-gnueabihf - node@20	39s
Test aarch64-unknown-linux-gnu - node@22	36s
Test x86_64-unknown-linux-musl - node@20	21s
Test aarch64-pc-windows-msvc - node@20	56s
Test armv7-unknown-linux-gnueabihf - node@22	53s
Test aarch64-unknown-linux-musl - node@22	28s
Test x86_64-pc-windows-msvc - node@22	1m 25s
Publish	16s
	56m 12s

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