fix: Simplify SSH key handling - delete existing key from Hetzner first

terraform/ssh.tf

@@ -2,21 +2,7 @@ data "local_file" "ssh_public_key" {
   filename = pathexpand(var.ssh_public_key)
 }
 
-data "hcloud_ssh_keys" "all_keys" {}
-
-locals {
-  existing_key = try([
-    for key in data.hcloud_ssh_keys.all_keys.ssh_keys :
-    key if key.name == "${var.cluster_name}-ssh-key"
-  ][0], null)
-}
-
 resource "hcloud_ssh_key" "cluster" {
-  count      = local.existing_key == null ? 1 : 0
   name       = "${var.cluster_name}-ssh-key"
   public_key = data.local_file.ssh_public_key.content
 }
-
-data "hcloud_ssh_key" "cluster" {
-  fingerprint = local.existing_key != null ? local.existing_key.fingerprint : hcloud_ssh_key.cluster[0].fingerprint
-}