Add `next_array` and `collect_array` #1063

Job	Run time
doc	14s
check format	10s
check	8s
check (--no-default-features)	7s
miri	3m 34s
msrv	34s
check (--no-default-features --features use_alloc)	19s
semver-checks	16s
check (--all-targets --all-features)	19s
test	53s
All checks succeeded	0s
	6m 34s

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