VP1SimHitSystem: build CaloDetDescrManager instead of retrieving it from DetStore

Vakhtang Tsulaiarequested to merge
tsulaia/athena:master-vp1hitsys-calodd into master

CaloDetDescrManager is no longer accessible via DetStore. The simplest fix for VP1SimHitSystem was to build the manager instead of retrieving it from DetStore

Tested at runtime by @rbianchi (thanks!)

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