add workflow to avoid detached pipelines
Closes #191 (closed)
Small change which prevents detached pipelines (merged results pipelines before merge) from running.
Relevant pipelines:
https://repo1.dso.mil/dsop/opensource/pipeline-test-project/kubectl/-/pipelines/121905
https://repo1.dso.mil/dsop/opensource/pipeline-test-project/kubectl/-/pipelines