incusd/storage/lvm: Handle newer LVM #3137

Job	Run time
Client (oldstable, ubuntu-latest)	1m 7s
Code (oldstable)	7m 46s
Client (oldstable, macos-latest)	58s
System (stable, cluster, dir)	12m 8s
Code (stable)	7m 53s
Client (oldstable, windows-latest)	1m 57s
System (stable, cluster, btrfs)	12m 21s
Code (tip)	10m 24s
System (stable, cluster, lvm)	12m 51s
Client (stable, ubuntu-latest)	1m 4s
System (stable, cluster, zfs)	13m 26s
Client (stable, macos-latest)	58s
System (stable, cluster, ceph)	15m 56s
Client (stable, windows-latest)	3m 14s
Documentation	5m 4s
System (stable, cluster, random)	13m 28s
System (stable, standalone, dir)	23m 53s
System (stable, standalone, btrfs)	28m 33s
System (stable, standalone, lvm)	40m 34s
System (stable, standalone, zfs)	39m 44s
System (stable, standalone, ceph)	1h 15m 21s
System (stable, standalone, random)	29m 30s
System (oldstable, cluster, dir)	13m 34s
System (oldstable, standalone, dir)	22m 1s
System (tip, cluster, dir)	16m 35s
System (tip, standalone, dir)	26m 51s
	7h 17m 11s

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