Do not post comments in release-approval pipeline
Since it rus on every (human) comment, the release-approval pipeline
can get pretty noisy. It's also not that critical to read (failure
generally meaning that you don't have the required +1s yet).
This change disables comment posting on success/failure in the pipeline.
success:
gerrit:
PTL-Approved: 1
+ comment: false
mysql:
failure:
gerrit:
PTL-Approved: 0
+ comment: false
mysql:
- pipeline:
