hybrid-array: Added serde impls for `Array` #1522

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	4m 31s
build (1.65.0, wasm32-unknown-unknown)	4m 41s
build (stable, thumbv7em-none-eabi)	27s
build (stable, wasm32-unknown-unknown)	19s
test (1.65.0)	5m 37s
test (stable)	22s
	15m 57s

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