Setup k3s with the help of ansible after the infra-provisioning

This change is huge! It allows me to manage the k3s installation on the
hetzner-cloud I setup via terraform.

main.tf

@@ -55,6 +55,15 @@ module "k8s" {
   }
 }
 
+resource "local_file" "ansible_inventory" {
+  filename = "${path.module}/inventory.ini"
+  content = templatefile("./inventory.ini.tftpl", {
+    server_ips  = module.k8s.server_ips_v4,
+    agent_ips   = module.k8s.agent_ips_v4,
+    k3s_version = var.k3s_version,
+  })
+}
+
 locals {
   dns_zones = {
     # costs-table (incl. taxes):