hybrid-array: remove `Array::from_slice` (#1018) #1574

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 23s
test (1.65.0)	1m 27s
test (stable)	17s
build (1.65.0, wasm32-unknown-unknown)	1m 22s
build (stable, thumbv7em-none-eabi)	19s
build (stable, wasm32-unknown-unknown)	19s
	5m 7s

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