Open requested to merge dmanuzzi_CALO_DD4HEP_v3.1 into Futurev5
This MR makes Gauss able to save ECAL and HCAL hits in its output file. Modifications are done on top of lhcb/Gauss!957 and lhcb/Gauss!959. The news from lhcb/Detector!337 is also assumed.
compare the output with DetDesc.
CellFromDD4hep.hreports 3 methods for the conversion between the ID of the volumes in
Detector::Calo::CellID(2 of them are commented now). All of them provide the same result. Todo: local test to choose the fastest one.