Added `array_permutations` (attempt 2) #1084

Job	Run time
miri	3m 34s
doc	15s
check	12s
check format	12s
check (--no-default-features)	20s
semver-checks	17s
check (--no-default-features --features use_alloc)	15s
msrv	41s
test	56s
check (--all-targets --all-features)	24s
All checks succeeded	0s
	7m 6s

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