WIP: Match new style LAr Digitization config to old
Modify ComponentAccumulator configuration for LAr Digitization with to match old style outputs.
Results are testable by Simulation/Digitization/test/LArConfigNewOld_test.sh.
Also:
Introduce config scripts for MergeRecoTimingObjTool, LArDigitThinner, and AthenaPoolCnvSvc writing settings.
Remove semi-duplicated configuration for LArADC2MeVCondAlgCfg.
Teach LArRawChannelBuilderAlgCfg to handle MC input, and update its test ref for updated LArADC2MeVCondAlgCfg.
Fix minor style issues.
TODO what to do about EventInfo in OutputStreamCfg?