sec1: migrate from `generic-array` to `hybrid-array` (#1298) #2144

Job	Run time
build (1.60.0, thumbv7em-none-eabi)	1m 35s
test (1.60.0)	1m 49s
build (1.60.0, wasm32-unknown-unknown)	1m 35s
test (stable)	17s
build (stable, thumbv7em-none-eabi)	16s
build (stable, wasm32-unknown-unknown)	17s
minimal-versions / minimal-versions	29s
	6m 18s

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