bigbang: add validation step on MRs
Note: Please merge !469 (merged) before merging this MR. Note: Please merge this MR before merging !466 (merged) as they are stacked.
Tested with: big-bang/bigbang!3479 (closed)
With a valid Upgrade Notices: https://repo1.dso.mil/big-bang/pipeline-templates/package-validation/-/jobs/28175902 With invalid Upgrade Notices: https://repo1.dso.mil/big-bang/pipeline-templates/package-validation/-/jobs/28175918
Needs the default MR template updated to include the upgrade notices default text.
Edited by Daniel Dides