The proxmox provider is now "supported" and regularly released.
We should upgrade our configuration to migrate to the last version
a quick test show there will be some adaptation to do:
```
~/src/swh/swh-sysadmin-provisioning/proxmox/terraform/staging master* ❯ terraform plan 18:22:32
╷
│ Error: Unsupported argument
│
│ on ../modules/node/main.tf line 60, in resource "proxmox_vm_qemu" "node":
│ 60: id = disk.value["id"]
│
│ An argument named "id" is not expected here. Did you mean "ssd"?
....
```