[pinpoint] enable buildbucket v2 on staging
[pinpoint] enable buildbucket v2 on staging

Starting running by default in staging.

Bug: chromium:1264738
Change-Id: I81a7eab2cb3ac88e66c0a4f7303a7dd304c6dfe7
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/3594462
Reviewed-by: John Chen <334fbfbb4df7c78f091ea1b77c69ca6ac731a3f3@chromium.org>
Commit-Queue: Wenbin Zhang <45ad8a1ff616a38a2202fd35571df81897c5f14f@google.com>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult