Allow upgrade branches to use latest caches for upgrade check
In the scenario having an upgrade branch for F35 the upgrade-check job fails since for this branch no latest image cache is created yet. In such a scenario it would be interesting to see, if the new branch will be a valid update to the main or develop branch before one is going to merge the changes into those branches.
@romanvalov any ideas? This is low priority, but nevertheless I'd like to know what you think.