[k8s-checker] Add status metrics for pods
[k8s-checker] Add status metrics for pods

Bug: skia:10543
Change-Id: Ia377bd035d73f7438d982f7c1c574943ebfba815
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/306601
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot