hybrid-array: add `ArrayN` type alias (#1017) #1573

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 19s
test (1.65.0)	1m 24s
build (1.65.0, wasm32-unknown-unknown)	1m 21s
test (stable)	17s
build (stable, thumbv7em-none-eabi)	14s
build (stable, wasm32-unknown-unknown)	16s
	4m 51s

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