SWS-7: Finish "download" workflow template

Make it so the download workflow actually works and does things!

ci/cleanup.template.yml

@@ -7,6 +7,8 @@
             "${REGISTRY_URL}/${PROJECT_NAME}/${SERVICE_NAME}:${CI_COMMIT_SHORT_SHA}"
         - docker image rm --force "${REGISTRY_URL}/${PROJECT_NAME}/${SERVICE_NAME}:${BRANCH_TAG}" "${REGISTRY_URL}/${PROJECT_NAME}/${SERVICE_NAME}:${CI_COMMIT_SHORT_SHA}"
     rules:
+        - if: '$CI_PIPELINE_SOURCE == "merge_request_event" && $CI_COMMIT_MESSAGE =~ /\A(?i)-debug/'
+          when: never
         - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
           when: always
         - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'