Add `zip_clones`, zips an iterator with clones of a value #1007

Job	Run time
check format	5s
miri	3m 2s
doc	7s
check	14s
check (--no-default-features)	13s
msrv	58s
check (--no-default-features --features use_alloc)	7s
semver-checks	10s
test	51s
check (--all-targets --all-features)	20s
All checks succeeded	0s
	6m 7s

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