Add/vertical pod autoscaler

[wcarlsen]

Adding vertical-pod-autoscaler (VPA).

The VPA project consists of 3 components:

• Recommender - monitors the current and past resource consumption and, based on it, provides recommended values for the containers' cpu and memory requests.
• Updater - checks whether managed pods have the correct resources configured and, if not, either updates them in place or evicts them so they can be recreated by their controllers with the updated requests.
• Admission Controller - sets the correct resource requests on new pods (either just created or recreated by their controller due to Updater's activity).

The Admission controller has a certificate in it's gut that we manage with cert-manager.