Improve Clusters documentation
What does this MR do?
Improve the flow of the clusters docs and consolidate the info we have from the k8s service integration.
Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/41965
Improve the flow of the clusters docs and consolidate the info we have from the k8s service integration.
Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/41965