Muon integration into DD4hep

This sits on top of !3309 (merged) (and thus have lots of other dependencies) and goes together with Detector!115 (merged), Rec!2655 (merged), Boole!371 (merged), Allen!724 (merged), Alignment!242 (merged) (and thus have lots of other dependencies)

Also depends on !3306 (merged), Rec!2605 (merged) and Moore!1141 (merged)