Use port 1022 for all cluster nodes as SSH-port and fix some config-errors

I'm oversaw completely, that I have to change the SSH-port for all nodes
in the cluster otherwise I cannot provide a meaningful load-balancer for
the git-ssh port in it.

Additionally this allowed me to fix some config errors which I simply
oversaw.

inventory.ini.tftpl

@@ -3,9 +3,6 @@
 ${ip}
 %{endfor~}
 
-[server:vars]
-ansible_port=${ssh_port}
-
 [agent]
 %{for ip in agent_ips~}
 ${ip}
@@ -16,5 +13,6 @@ server
 agent
 
 [k3s_cluster:vars]
+ansible_port=${ssh_port}
 network_cidr=${network_cidr}
 private_nat=${private_nat}