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.

modules/hetzner/kubernetes/outputs.tf

@@ -0,0 +1,11 @@
+output "server_ips_v4" {
+  value = [for key, value in hcloud_server.server : value.ipv4_address]
+}
+
+output "server_ips_v6" {
+  value = [for key, value in hcloud_server.server : value.ipv6_address]
+}
+
+output "agent_ips_v4" {
+  value = flatten([for key, value in hcloud_server.agent : value.network.*.ip])
+}