d/a/local-gitlab-ci.yml: Do not run on tags

Add some rules to the local pipeline so it gets skipped when tags are
pushed, instead of creating jobs that are currently failing.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

debian/apertis/local-gitlab-ci.yml

@@ -10,3 +10,9 @@ test:
     - pipeline: $PARENT_PIPELINE_ID
       job: prepare-build-env
       artifacts: true
+  rules:
+    - if: $CI_MERGE_REQUEST_ID
+      when: never
+    - if: $CI_COMMIT_BRANCH
+      when: on_success
+    - when: never