Update Knative to 0.7
Description
Knative 0.7 is now available. We should update our serverless / Knative charts.
Istio
We need to understand what changes has been made to Istio deployment, and how it was decoupled from Knative.
Release page: https://github.com/knative/serving/releases/tag/v0.7.0
Edited by Grzegorz Bizon