Add `ArrayVecCopy` #212

Job	Run time
nostd/thumbv6m-none-eabi/stable	12s
miri	44s
check-generated	3s
tests (1.51.0, serde, false, --skip spare_capacity_mut)	1m 34s
tests (1.70.0, serde, false)	31s
tests (stable, true, false)	38s
tests (beta, serde, false)	28s
tests (nightly, serde, borsh, zeroize, false)	25s
	4m 35s

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