add flatcar support for Hetzner (#9618)

contrib/terraform/hetzner/modules/kubernetes-cluster-flatcar/outputs.tf

@@ -0,0 +1,27 @@
+output "master_ip_addresses" {
+  value = {
+    for key, instance in hcloud_server.master :
+    instance.name => {
+      "private_ip" = hcloud_server_network.master[key].ip
+      "public_ip"  = hcloud_server.master[key].ipv4_address
+    }
+  }
+}
+
+output "worker_ip_addresses" {
+  value = {
+    for key, instance in hcloud_server.worker :
+    instance.name => {
+      "private_ip" = hcloud_server_network.worker[key].ip
+      "public_ip"  = hcloud_server.worker[key].ipv4_address
+    }
+  }
+}
+
+output "cluster_private_network_cidr" {
+  value = var.private_subnet_cidr
+}
+
+output "network_id" {
+  value = hcloud_network.kubernetes.id
+}