.oniro-ci: use the same rule for rauc-bundle build and publish jobs

In `.gitlab-ci.yml`, rauc-bundle build and publish jobs all extends
`workspace-rules`, and the latter job needs the former job. This is
good.

However, with the rules defined on the upstream job
'.publish-rauc-bundle-to-hawkbit', gitlab always try to add rauc-bundle publish
jobs into pipeline, when the build jobs are not added, error occurs.

Signed-off-by: Chase Qi <chase.qi@linaro.org>

.oniro-ci/build-generic.yaml

@@ -391,15 +391,6 @@
     - hawkbitctl upload
         -m "$CI_ONIRO_HAWKBIT_SWMOD_NAME:$BUNDLE_VERSION"
         -a "${CI_PROJECT_DIR}/artifacts/images/${MACHINE}/$(readlink "${CI_PROJECT_DIR}/artifacts/images/${MACHINE}/${CI_ONIRO_RAUC_BUNDLE_NAME}-${MACHINE}.raucb")"
-  rules:
-    # Publishing is done only for scheduled builds
-    - if: '$CI_PIPELINE_SOURCE == "schedule"'
-    # Run the job when a tag is placed.
-    - if: '$CI_COMMIT_TAG'
-    # For merge requests, the publishing is optional and can be triggered manually.
-    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
-      when: manual
-      allow_failure: true
 
 .build-zephyr-image:
   extends: .build-image