feat(terraform): replace centos with ipfabric in supported os list

Update the `supported_os` local variable in `01-virtual-machines.tf` to
reflect current provisioning requirements. This change removes `centos`
and adds `ipfabric` to the set of allowed operating system templates.

terraform/prod/01-virtual-machines.tf

@@ -10,7 +10,7 @@ data "proxmox_virtual_environment_vms" "templates" {
 # 2. Mapping des templates
 locals {
   # OS supportés
-  supported_os = toset(["ubuntu", "debian", "alpine", "rocky", "centos"])
+  supported_os = toset(["ubuntu", "debian", "alpine", "rocky", "ipfabric"])
 
   # Map des templates par OS
   template_map = {