sha: make compress consume blocks #1122

Job	Run time
minimal-versions / minimal-versions	1m 12s
set-msrv / set-msrv	3s
macos (1.72.0)	47s
build (1.72.0, thumbv7em-none-eabi)	29s
macos (stable)	34s
cross (1.72.0, aarch64-unknown-linux-gnu, default)	53s
build (1.72.0, wasm32-unknown-unknown)	23s
cross (1.72.0, powerpc-unknown-linux-gnu, default)	48s
build (1.72.0, loongarch64-unknown-linux-gnu)	20s
cross (stable, aarch64-unknown-linux-gnu, default)	40s
build (stable, thumbv7em-none-eabi)	27s
linux (i686-unknown-linux-gnu, 1.72.0, sudo apt update && sudo apt install gcc-multilib)	1m 52s
cross (stable, powerpc-unknown-linux-gnu, default)	52s
build (stable, wasm32-unknown-unknown)	29s
linux (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 29s
build (stable, loongarch64-unknown-linux-gnu)	32s
linux (x86_64-unknown-linux-gnu, 1.72.0)	1m 0s
windows (1.72.0, x86_64-pc-windows-gnu)	1m 1s
linux (x86_64-unknown-linux-gnu, stable)	59s
windows (stable, x86_64-pc-windows-gnu)	1m 13s
	16m 3s

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