incus-agent: Use NetlinkInterfaces #700

Job	Run time
Code (oldstable)	7m 33s
Client (oldstable, ubuntu-latest)	24s
Documentation	7m 33s
Code (stable)	7m 40s
System (stable, cluster, dir)	11m 47s
Client (oldstable, macos-latest)	29s
Code (tip)	10m 11s
System (stable, cluster, btrfs)	11m 58s
Client (oldstable, windows-latest)	52s
System (stable, cluster, lvm)	12m 43s
Client (stable, ubuntu-latest)	28s
System (stable, cluster, zfs)	12m 47s
Client (stable, macos-latest)	44s
System (stable, cluster, ceph)	15m 51s
Client (stable, windows-latest)	1m 38s
System (stable, cluster, random)	13m 42s
System (stable, standalone, dir)	22m 42s
System (stable, standalone, btrfs)	22m 11s
System (stable, standalone, lvm)	39m 17s
System (stable, standalone, zfs)	38m 22s
System (stable, standalone, ceph)	1h 15m 27s
System (stable, standalone, random)	22m 50s
System (oldstable, cluster, dir)	11m 51s
System (oldstable, standalone, dir)	23m 43s
System (tip, cluster, dir)	15m 5s
System (tip, standalone, dir)	25m 21s
	6h 53m 9s

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