incusd: Update init functions #81

Job	Run time
Code tests	4m 38s
Client tests (1.20.x, ubuntu-latest)	59s
Documentation tests	8m 15s
System tests (1.20.x, cluster, dir)	7m 44s
Client tests (1.20.x, macos-latest)	59s
System tests (1.20.x, cluster, btrfs)	7m 43s
Client tests (1.20.x, windows-latest)	1m 36s
System tests (1.20.x, cluster, lvm)	7m 41s
System tests (1.20.x, cluster, zfs)	7m 41s
System tests (1.20.x, cluster, ceph)	7m 44s
System tests (1.20.x, cluster, random)	7m 43s
System tests (1.20.x, standalone, dir)	7m 45s
System tests (1.20.x, standalone, btrfs)	7m 41s
System tests (1.20.x, standalone, lvm)	7m 44s
System tests (1.20.x, standalone, zfs)	7m 43s
System tests (1.20.x, standalone, ceph)	7m 41s
System tests (1.20.x, standalone, random)	7m 43s
System tests (stable, cluster, dir)	7m 42s
System tests (stable, standalone, dir)	7m 43s
System tests (tip, cluster, dir)	7m 43s
System tests (tip, standalone, dir)	7m 41s
	2h 19m 49s

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