The document is now in openstack-manuals, we can remove it here
completely together with the jobs for building it.
Add a redirect to new location.
Depends-On: https://review.opendev.org/671115
Change-Id: Ife74ae2b83bdae1e206b0705faf6f623428a3f1f
Use the native zuul v3 templates that are defined in openstack-manuals
repository.
Change-Id: If92d9d079fd945ff2e43b9abc7758d05e0ad5dc8
Depends-On: I377632e640a099d0a8640db4959684d9ecd68f8c