sm3

k12: new implementation with parallel processing support #1165

Job	Run time
minimal-versions / minimal-versions	32s
set-msrv / set-msrv	6s
test (stable)	30s
test (1.85.0)	32s
build (stable, thumbv7em-none-eabi)	22s
build (stable, wasm32-unknown-unknown)	28s
build (1.85.0, thumbv7em-none-eabi)	21s
build (1.85.0, wasm32-unknown-unknown)	23s
	3m 14s

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