Support `no_unroll` for Ascon #261

Job	Run time
set-msrv / set-msrv	2s
minimal-versions / minimal-versions	43s
test (1.71.0)	43s
build (1.71.0, thumbv7em-none-eabi)	23s
test (stable)	41s
build (1.71.0, wasm32-unknown-unknown)	20s
build (stable, thumbv7em-none-eabi)	12s
build (stable, wasm32-unknown-unknown)	17s
	3m 21s

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