We've already migrated all the legacy artifacts to the new realm,
which is ci_job_artifacts table.
It's time to remove the old code base that is no longer used.
The expansion hover animation caused a number of layout headaches; this
commit removes the animation and replaces them with hover/active/focus
styles.
Related issue:
https://gitlab.com/gitlab-org/gitlab-ce/issues/42769
These are data columns that store runtime configuration
of build needed to execute it on runner and within pipeline.
The definition of this data is that once used, and when no longer
needed (due to retry capability) they can be freely removed.
They use `jsonb` on PostgreSQL, and `text` on MySQL (due to lacking
support for json datatype on old enough version).