feat: add mold for linux #1576

Job	Run time
test (ubuntu-latest)	15m 52s
Build x86_64-unknown-linux-musl	7m 50s
test (macos-latest)	6m 10s
Build aarch64-unknown-linux-musl	8m 15s
test (windows-latest)	11m 41s
Build powerpc64le-unknown-linux-gnu	8m 30s
Build x86_64-apple-darwin	11m 27s
Build aarch64-apple-darwin	10m 21s
Build x86_64-pc-windows-gnu	16m 5s
Build x86_64-pc-windows-msvc	15m 31s
Post-process	3s
	1h 51m 45s

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