Cleanup old periodic pbr jobs
Cleanup old periodic pbr jobs

These jobs are legacy devstack-gate jobs and are going to be removed.
Clean them out of project-config so that we can remove the jobs from pbr
entirely.

Depends-On: https://review.opendev.org/#/c/745171/
Change-Id: I8e2313e45362ad53f437e0ac428ffdf11e2e9f6a

openstack-infra/project-config,openstack-infra/project-config