[feature request] bump controller-runtime vendor version to k8s 1.20

[SimonCqk]

What would you like to be added:

In k8s >=1.20, align with controller-runtime >=0.8.x, list/watch transport protocol of built-in resources(pods, services...) has upgraded from json to protobuf, which brings considerable performance improvement in large scale clusters.

Why is this needed:

[jian-he]

@SimonCqk is this finished ?