pkcs5

pkcs12: make `zeroize` dependency optional (#1564) #3239

Job	Run time
build (1.81.0, thumbv7em-none-eabi)	34s
test (1.81.0)	3m 15s
build (1.81.0, wasm32-unknown-unknown)	33s
test (stable)	3m 9s
build (stable, thumbv7em-none-eabi)	31s
build (stable, wasm32-unknown-unknown)	28s
minimal-versions	0s
	8m 30s

Provide feedback