terraform: upgrade proxmox provider to last release

The proxmox provider is now "supported" and regularly released. [1]

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"?
....

• [1] https://registry.terraform.io/providers/Telmate/proxmox/latest/docs

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Migrated from T3806 (view on Phabricator)