Remove use of tiller from Kubernetes integration (Helm v3)
Problem to solve
GitLab Kubernetes integration makes use of Helm Tiller. Tiller will be removed as part of Helm V3.0.0 to provide a way to simply fetch information from the Kubernetes API server, render the Charts client-side, and store a record of the installation in Kubernetes.
Update the Kubernetes integration to remove use of tiller.