…library paradigm.

…acker

… detector itself is identical to T21. The description should be compatible with both DDD and DD4hep.

…on is D77, description is T24. Description is the first compatible with both old DD and DDDhep. Running a Phase 2 DD4hep workflow on any other geometry scenarion does not make any sense, as the descriptions were incompatible with DD4hep.

… Outer Trackers, as evth is identical from OT cabling map point of view.

…mes are distinct for flipped and unflipped ladders. Here, the active volume names are the same anyway (hence all volumes are properly selected).

…ht can check for regression), but Tracker envelope changed to leave space for FCBM.

…dicated repo, the file is not dd4hep-specific.