Removes the omnibus from building after gitlab
- Unsure why we decided to build omnibus after a triggered build for
gitlab, however, I don't think we should do this
- The job will probably never pass as we are passing in the sha for omnibus as the param for gitlab-{c|e}e, which has a HIGH potential to not exist
- This MR also includes a minor change to adjust the pipeline ID utilized so we can more easily and transparently tell which CI pipeline was created for any build