feat(exx-Pipeline): exclude MRs rule

templates/releasing/release.gitlab-ci.yml

@@ -13,6 +13,8 @@
     # This is so depending triggers can run successfully.
     - if: '$CI_PIPELINE_SOURCE == "pipeline"'
       when: never
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+      when: never
     - if: $CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH
       when: manual
     - if: $CI_COMMIT_REF_NAME == 'Templates2.0'
@@ -25,6 +27,8 @@
 .release-release-branch:
   extends: .release-common
   rules:
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+      when: never
     - if: $CI_COMMIT_REF_NAME =~ /^RELEASE.*/
       when: manual
       #Do not make releases available in TAG CIs