[gold] Update lkgr
[gold] Update lkgr

This includes the dots-sk updates as well as the alternative commit
messages for Chrome.

Change-Id: I07d717e81c5f2547842e59b39dc06c351c8c056f
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/273807
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@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