[WIP] blake2: integrate `blake2b_simd`/`blake2s_simd` crates #638

Job	Run time
minimal-versions / minimal-versions	14s
set-msrv / set-msrv	5s
build (stable, wasm32-unknown-unknown)	20s
build (stable, thumbv7em-none-eabi)	1s
test (1.85.0)	1s
build (1.85.0, wasm32-unknown-unknown)	1s
build (1.85.0, thumbv7em-none-eabi)	20s
test (stable)	1s
	1m 3s

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