sec1: migrate from `generic-array` to `hybrid-array` #2041

Job	Run time
build (1.65.0, wasm32-unknown-unknown)	1m 45s
test (i686-unknown-linux-gnu, 1.65.0, sudo apt update && sudo apt install gcc-multilib)	5m 47s
build (1.65.0, thumbv7em-none-eabi)	1m 44s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	3m 45s
build (stable, wasm32-unknown-unknown)	26s
test (x86_64-unknown-linux-gnu, 1.65.0)	5m 42s
build (stable, thumbv7em-none-eabi)	27s
test (x86_64-unknown-linux-gnu, stable)	3m 46s
minimal-versions / minimal-versions	2m 32s
	25m 54s

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