Migrate to `hybrid-array`; MSRV 1.65 (#944) #1512

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	5m 31s
test (1.65.0)	4m 39s
build (1.65.0, wasm32-unknown-unknown)	5m 19s
test (stable)	33s
build (stable, thumbv7em-none-eabi)	21s
build (stable, wasm32-unknown-unknown)	28s
	16m 51s

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