Add a function to clone map and use it where appropriate #3024

Job	Run time
Documentation	1m 20s
Code (oldstable)	1m 21s
Client (oldstable, ubuntu-latest)	40s
Code (stable)	1m 19s
Client (oldstable, macos-latest)	1m 17s
Code (tip)	1m 20s
Client (oldstable, windows-latest)	1m 6s
System (stable, cluster, dir)	1m 8s
Client (stable, ubuntu-latest)	53s
System (stable, cluster, btrfs)	1m 20s
Client (stable, macos-latest)	1m 15s
System (stable, cluster, lvm)	1m 20s
Client (stable, windows-latest)	1m 5s
System (stable, cluster, zfs)	1m 10s
System (stable, cluster, ceph)	1m 18s
System (stable, cluster, random)	1m 11s
System (stable, standalone, dir)	1m 18s
System (stable, standalone, btrfs)	1m 8s
System (stable, standalone, lvm)	1m 6s
System (stable, standalone, zfs)	1m 17s
System (stable, standalone, ceph)	1m 21s
System (stable, standalone, random)	1m 6s
System (oldstable, cluster, dir)	1m 6s
System (oldstable, standalone, dir)	1m 10s
System (tip, cluster, dir)	1m 18s
System (tip, standalone, dir)	1m 18s
	31m 11s

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