sec1: migrate from `generic-array` to `hybrid-array` #2602

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	3m 2s
build (1.65.0, wasm32-unknown-unknown)	2m 56s
derive (1.65.0)	1m 37s
build (stable, thumbv7em-none-eabi)	1m 22s
derive (stable)	22s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.65.0, sudo apt update && sudo apt install gcc-mult...	13m 9s
build (stable, wasm32-unknown-unknown)	1m 19s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	9m 59s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.65.0)	13m 31s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	9m 39s
	56m 56s

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