Start using goimports #3034

Job	Run time
Client (oldstable, ubuntu-latest)	1m 3s
Client (oldstable, macos-latest)	1m 23s
Code (oldstable)	4m 13s
Code (stable)	4m 19s
Client (oldstable, windows-latest)	3m 46s
Code (tip)	7m 10s
Client (stable, ubuntu-latest)	1m 5s
System (stable, cluster, dir)	11m 58s
Client (stable, macos-latest)	1m 12s
System (stable, cluster, btrfs)	12m 13s
Client (stable, windows-latest)	1m 51s
Documentation	5m 1s
System (stable, cluster, lvm)	14m 44s
System (stable, cluster, zfs)	12m 57s
System (stable, cluster, ceph)	16m 51s
System (stable, cluster, random)	12m 57s
System (stable, standalone, dir)	22m 20s
System (stable, standalone, btrfs)	22m 6s
System (stable, standalone, lvm)	40m 43s
System (stable, standalone, zfs)	39m 52s
System (stable, standalone, ceph)	43m 56s
System (stable, standalone, random)	30m 12s
System (oldstable, cluster, dir)	11m 44s
System (oldstable, standalone, dir)	23m 30s
System (tip, cluster, dir)	14m 37s
System (tip, standalone, dir)	26m 46s
	6h 28m 29s

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