Remove use of tiller from Auto DevOps (Helm v3)

Problem to solve

Auto DevOps currently 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.

Intended users

Further details

Proposal

Remove use of tiller in Auto DevOps

Permissions and Security

Documentation

Testing

What does success look like, and how can we measure that?

Links / references