Add Customized trait for blake2 #1120

Job	Run time
minimal-versions / minimal-versions	40s
set-msrv / set-msrv	8s
test (1.85.0)	38s
build (stable, thumbv7em-none-eabi)	13s
test (stable)	35s
build (1.85.0, thumbv7em-none-eabi)	24s
build (1.85.0, wasm32-unknown-unknown)	30s
build (stable, wasm32-unknown-unknown)	27s
	3m 35s

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