[Rdo-list] delorean.repo vs delorean-deps.repo

[Alan Pevec]

> Would we want to keep all passed-ci repos over time? It should not be too hard to make the promote script fetch all packages in delorean-liberty-testing and delorean-common-testing during promotion and rebuild the repo with them. However, it could increase storage usage (~330 MB at the moment).

This might be shaved a bit if we'd use hardlinking but I would not
invest too much effort into this, using -testing repos is temporary
during developement. Proposed production CI flow would be:
1. builds are tagged into CBS -testing tag from rdoupdate yml in gerrit
2. this triggers cbs repos regen which would trigger promotion job on
ci.centos.org
3. on pass builds are tagged into -release tag and announcement
auto-generated using openstack/reno and description in rdoupdate yaml
4. release is signed and published to mirror.centos.org

This CI should ensure that deps is reliable and can be treated same as base OS.

Cheers,
Alan