Add option to specify DD4hep build type in the DD4hepSvc

Ben Couturierrequested to merge
allow_setting_dd4hep_build_type into master

Add option to specify DD4hep build type in the DD4hepSvc, to allow using a simplified version of the geometry in some cases. This requires Detector!660 (merged) as the DISPLAY mode in Detector crashes otherwise.

Edited by Ben Couturier

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