Remove ConfigMap once applications are already installed
### Description
Once Ingress/Prometheus/Runner are successfully installed we need to remove ConfigMap `values-content-configuration` since is no longer needed
### Proposal
Remove ConfigMap once Cluster Applications are is installed
### Links / references
https://gitlab.com/gitlab-org/gitlab-ce/issues/41053
https://gitlab.com/gitlab-org/gitlab-ce/issues/32831
cc @bikebilly @ayufan
issue