EL10 virthost upgrades

- See: `updates-uptime-cmd.py list --osname=9 '*vmhost*'`
- silence the <virthost> in Nagios/Zabbix
- virsh list
- per VM:
- grab the XML from `/etc/libvirt/qemu/<hostname>.xml` and copy the XML
- Created/used `~/el9-vmhosts-qemu-backups/<virthost>/` on batcave.
- shutdown the vm
- switch to the DRAC console
- PXEboot the host
- pick the <os>-nodisk option from grub
- boots to vnc and asks you to fill in the disk stuff
- 1Gb -> /boot (ext4)
- 0.5Gb -> /boot/efi (format as EFI System partition)
- unlock the encrypted LUKS
- reformat /, /boot, /boot/efi, and SWAP
- Change /boot/efi to esp partition type, or you'll get a weird partitioning error when it uses the default of vfat.
- leave the guests alone
- double check the destroy/create box, and then hit begin install
- Reboot, you'll need the LUKS key (no tang yet)
- Delete the ansible facts cache for the host
- `rm ~/.ansible_facts_cache/<virthost>`
- Run the playbook to fix everything
- You might need to first manually **upgrade** `redhat-release`, so you get the new PQC GPG keys, or some package installs will fail.
- `groups/virthost.yml --limit <virthost>`
- Maybe with `--skip-tags zabbix_api` first ;)
- Update to the latest packages: `yum up -y`
- Reboot.
- Restore the VMs
- Copy the XML files back.
- For each file: `virsh define <hostname>.xml`
- Then check with: `virsh list --all`
- Then start them with: `virsh start <hostname>`
- Rerun the playbook, with no skips, to make sure everything is good.