hybrid-array: add `PartialEq` impls for core array (#1025) #1581

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 23s
build (1.65.0, wasm32-unknown-unknown)	1m 22s
test (1.65.0)	1m 26s
build (stable, thumbv7em-none-eabi)	26s
test (stable)	16s
build (stable, wasm32-unknown-unknown)	16s
	5m 9s

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