AthenaConfiguration: remove global ConfigFlags instance
Remove the global ConfigFlags
instance and the safe-guards to delete the instance manually from the various skeletons and drivers.
There are still quite a few references to import ConfigFlags in our repository. But likely these are all unused legacy job options.
Requires: !69145 (merged) !69129 (merged) !69173 (merged)
cc @tadej
Edited by Frank Winklmeier