Use metrics logging in codereview-watcher
Use metrics logging in codereview-watcher

So that errors are alerted

Bug: skia:12135
Change-Id: I8bea75330b4b195e46a8f5e2ac4e22628005aae1
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/420938
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Commit-Queue: 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