Improve checks on folding/branching
Background
As explained in apertis-infrastructure!216 (comment 150760) the folding and branching pipelines should help to identify potential issues, like packages which have not reached the APT repos, to avoid releasing unhealty images.
Outcomes
TBD
Management data
This section is for management only, it should be the last one in the description.
/cc @em @Balasubramanian @sudarshan @wlozano
Phabricator link: https://phabricator.apertis.org/T10872