Back-port v5 fix 9fb76579c to v6. CheckBackupsWithInventory now filters
same-VMID guest candidates by backup kind (qemu/lxc) before attributing
a backup, in both the canonical-key lookup and the bare-VMID secondary
path. Without this, a vm backup with vmid=101 was attributed to an lxc
container with the same vmid (or vice-versa), suppressing the
orphaned-backup alert and attaching the wrong guest identity.
Adds guestMatchesBackupType/filterGuestsByBackupType helpers and a
regression test.
rcourtman
9c8218ef0d