Remove migrated octavia zuul v3 jobs
Remove migrated octavia zuul v3 jobs

Now that all of the octavia jobs have been migrated in-repo[1] this patch
removes the migrated jobs from the octavia project.

[1] https://review.openstack.org/#/c/512870/

Change-Id: Ic500666950104248a6f3099d1fa2c2d7835d78cf

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