Remove ability to configure Barcode offsets in BarcodeSvc as they are now hard-coded

Merged John Derek Chapman requested to merge jchapman/athena:BarcodeSvcConfig_23.0 into 23.0

GenParticle barcode offsets have been hard-coded in the C++ for sometime, so having them be configurable in the BarcodeSvc implementations was misleading.

This MR removes those configuration options in legacy config and CA.

Tagging @averbyts.

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