golangci: Add local prefixes for goimports #3088

Job	Run time
Documentation	5m 20s
Code (oldstable)	7m 41s
Client (oldstable, ubuntu-latest)	1m 5s
Code (stable)	8m 12s
Client (oldstable, macos-latest)	54s
Code (tip)	10m 29s
Client (oldstable, windows-latest)	1m 53s
System (stable, cluster, dir)	14m 9s
Client (stable, ubuntu-latest)	1m 14s
System (stable, cluster, btrfs)	13m 19s
Client (stable, macos-latest)	56s
System (stable, cluster, lvm)	18m 45s
Client (stable, windows-latest)	2m 58s
System (stable, cluster, zfs)	14m 10s
System (stable, cluster, ceph)	17m 54s
System (stable, cluster, random)	18m 9s
System (stable, standalone, dir)	23m 38s
System (stable, standalone, btrfs)	23m 36s
System (stable, standalone, lvm)	44m 13s
System (stable, standalone, zfs)	40m 25s
System (stable, standalone, ceph)	1h 17m 28s
System (stable, standalone, random)	24m 47s
System (oldstable, cluster, dir)	13m 49s
System (oldstable, standalone, dir)	24m 41s
System (tip, cluster, dir)	15m 12s
System (tip, standalone, dir)	26m 33s
	7h 31m 30s

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