fix: declare providers at project level

terraform/modules/pve_vm/provider.tf

@@ -5,14 +5,3 @@ terraform {
     }
   }
 }
-
-provider "proxmox" {
-  endpoint  = var.proxmox_endpoint
-  api_token = var.proxmox_api_token
-  insecure  = false
-  ssh {
-    agent       = false
-    private_key = file("~/.ssh/id_ed25519")
-    username    = "root"
-  }
-}