[reno] Stop publishing release notes

Since we copy all release notes to the integrated repo there is not need
in publishing release notes for each repository. We should only verify their
validity and linting.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/777601
Change-Id: Ic0d72d232bc1d0cfc2f252d0550d1d4a08a32340

zuul.d/project.yaml

@@ -22,4 +22,4 @@
       # adding the next job template
       # - openstack-ansible-deploy-aio_distro_metal-jobs
       - publish-openstack-docs-pti
-      - release-notes-jobs-python3
+      - build-release-notes-jobs-python3