Storage configuration changes:
- Add full_clone=true for better LINSTOR compatibility
- Add replicate=1 to disk config for k3s servers on LINSTOR
- Configure etcd-witness to use local-lvm storage on thinkpad
- Add etcd_witness_storage_pool variable with local-lvm default
Fixes:
- etcd-witness now uses local storage since thinkpad is LINSTOR controller only
- k3s-server-1 and k3s-server-2 use LINSTOR replicated storage on acemagician/elitedesk
- Explicit replication flag helps LINSTOR create resources correctly