When we get a pod from nodepool, this starts a kubectl port-forward
on the pod so that zuul-console and the normal method of streaming
command output will work.
Change-Id: Iae85347c3d8e0a74e330a7b62b513c7b41641383
Story: 2007321
Task: 38832
Depends-On: https://review.opendev.org/709259