Add `next_array` and `collect_array` #1043

Job	Run time
doc	18s
check format	14s
check	13s
miri	3m 28s
check (--no-default-features)	16s
msrv	41s
check (--no-default-features --features use_alloc)	15s
semver-checks	51s
test	1m 1s
check (--all-targets --all-features)	26s
All checks succeeded	1s
	7m 44s

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