Add logic for release process of UBI-based images
With this MR:
- UBI tags are only built on dev rather than on dot-com.
- UBI assets release job is triggered from dev and publishes to dot-com's Releases page.
- UBI assers release job is made manual so it can be triggered from release-tools.
This is part of a solution for gitlab-org/distribution/team-tasks#444 (closed).
Edited by Hossein Pursultani