Juju can't find KVM images for arm64 focal

In testrun https://solutions.qa.canonical.com/testruns/testRun/66cfff7a-8dd3-43bf-9c2f-fd26071d4467, which is on an arm64 lab on focal, fails with:

```
Machine State Address Inst id Series AZ Message
0 started 10.246.200.106 sqa-lab2-node-1-arm focal zone1 Deployed
0/lxd/0 started 10.246.200.210 juju-91e9d3-0-lxd-0 focal zone1 Container started
1 started 10.246.200.107 sqa-lab2-node-2-arm focal zone2 Deployed
1/lxd/0 started 10.246.200.209 juju-91e9d3-1-lxd-0 focal zone2 Container started
1/lxd/1 started 10.246.200.208 juju-91e9d3-1-lxd-1 focal zone2 Container started
2 started 10.246.200.105 sqa-lab2-node-3-arm focal zone3 Deployed
2/lxd/0 started 10.246.200.212 juju-91e9d3-2-lxd-0 focal zone3 Container started
2/lxd/1 started 10.246.200.213 juju-91e9d3-2-lxd-1 focal zone3 Container started
3 started 10.246.200.108 sqa-lab2-node-4-arm focal zone1 Deployed
3/lxd/0 started 10.246.200.207 juju-91e9d3-3-lxd-0 focal zone1 Container started
4 started 10.246.200.109 sqa-lab2-node-6-arm focal zone3 Deployed
4/lxd/0 started 10.246.200.214 juju-91e9d3-4-lxd-0 focal zone3 Container started
5 started 10.246.200.200 sqa-lab2-node-7-arm focal zone1 Deployed
5/kvm/0 down pending focal no results for "arm64", "focal", "released", "uefi1.img"
5/lxd/0 started 10.246.200.211 juju-91e9d3-5-lxd-0 focal zone1 Container started
5/lxd/1 started 10.246.200.217 juju-91e9d3-5-lxd-1 focal zone1 Container started
6 started 10.246.200.110 sqa-lab2-node-8-arm focal zone2 Deployed
6/lxd/0 started 10.246.200.205 juju-91e9d3-6-lxd-0 focal zone2 Container started
6/lxd/1 started 10.246.200.206 juju-91e9d3-6-lxd-1 focal zone2 Container started
7 started 10.246.200.203 sqa-lab2-node-9-arm focal zone3 Deployed
7/kvm/0 down pending focal no results for "arm64", "focal", "released", "uefi1.img"
7/lxd/0 started 10.246.200.215 juju-91e9d3-7-lxd-0 focal zone3 Container started
7/lxd/1 started 10.246.200.216 juju-91e9d3-7-lxd-1 focal zone3 Container started
8 started 10.246.200.201 vault-1 focal zone1 Deployed
9 started 10.246.200.204 vault-2 focal zone2 Deployed
10 started 10.246.200.202 vault-3 focal zone3 Deployed
```

I think this is an issue from Juju, but I'm not sure.

Configs and crashdumps can be found here:
https://oil-jenkins.canonical.com/artifacts/66cfff7a-8dd3-43bf-9c2f-fd26071d4467/index.html