Move setup of foundational service from k8s to k3s

It simply doesn't make sense to split the installation of the
kubernetes-cluster from the provisioning of foundational services.
Therefore I drop the idea to organise these services in another
terraform-setup and instead ensure their presence with ansible, as it's
already responsible for setting up the cluster and keep it up-to.date.

.gitignore

@@ -2,6 +2,7 @@ inventory.*
 !inventory.ini.tftpl
 README.*
 !README.adoc
+password.txt
 
 # Created by https://www.toptal.com/developers/gitignore/api/vim,ansible,jetbrains,terraform
 # Edit at https://www.toptal.com/developers/gitignore?templates=vim,ansible,jetbrains,terraform