Remove gitlab-managed-app namespace and tiller-admin clusterrolebinding after helm is uninstalled
moved from gitlab-foss!32793 (closed)
What does this MR do?
After uninstalling Helm we can also clear out everything under the gitlab-managed-apps
namespace as well as the tiller-admin clusterrolebinding.
This contributes to gitlab-foss#57890 (moved) #26815 (closed)