`juju status` shows LXD VMs as containers

[Simon Déziel]

It's a small thing but some Juju messages are referring to LXD VMs as being containers:

```
$ juju add-machine --constraints="virt-type=virtual-machine"

$ juju status
Model Controller Cloud/Region Version SLA Timestamp
microarm overlord microcloud-vm/default 3.1.0 unsupported 09:46:22-04:00

Machine State Address Inst id Base AZ Message
7 pending juju-24971e-7 ubuntu@22.04 Container started

$ juju debug-log --level DEBUG --replay | grep -F juju-24971e-7
controller-0: 09:46:15 INFO juju.worker.provisioner started machine 7 as instance juju-24971e-7 with hardware "arch=arm64 cores=0 mem=0M virt-type=virtual-machine", network config [], volumes [], volume attachments map[], subnets to zones [], lxd profiles []
controller-0: 09:46:25 INFO juju.worker.instancepoller machine "7" (instance ID "juju-24971e-7") instance status changed from {"running" "Container started"} to {"running" "Running"}
controller-0: 09:46:25 INFO juju.worker.instancepoller machine "7" (instance ID "juju-24971e-7") has new addresses: [local-cloud:10.92.44.3@alpha local-cloud:fd42:6f75:6649:2901:216:3eff:fe71:8b2b@alpha]
controller-0: 09:47:59 INFO juju.worker.instancepoller machine "7" (instance ID "juju-24971e-7") has new addresses: []
controller-0: 09:49:01 INFO juju.worker.instancepoller machine "7" (instance ID "juju-24971e-7") has new addresses: [local-cloud:10.92.44.3@alpha local-cloud:fd42:6f75:6649:2901:216:3eff:fe71:8b2b@alpha]
```

But that juju-24971e-7 instance is indeed a virtual machine:

```
$ lxc ls microcloud:juju-24971e-7
+---------------+---------+-------------------+-----------------------------------------------+-----------------+-----------+----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS | LOCATION |
+---------------+---------+-------------------+-----------------------------------------------+-----------------+-----------+----------+
| juju-24971e-7 | RUNNING | 10.92.44.3 (eth0) | fd42:6f75:6649:2901:216:3eff:fe71:8b2b (eth0) | VIRTUAL-MACHINE | 0 | micro02 |
+---------------+---------+-------------------+-----------------------------------------------+-----------------+-----------+----------+
```

Additional information:

```
$ snap list juju
Name Version Rev Tracking Publisher Notes
juju 3.1.0 22136 3.1/stable canonical✓ -
```