Component accumulator in derivation framework - part 2a: TRUTH0 format
This is the second part of the migration of the derivation framework to the component accumulator. The change sets up the TRUTH0 format, which reads the HepMC in EVNT files and makes a complete and unaugmented copy in xAOD form.
It was necessary to create a new config fragment in xAODTruthCnvConfigNew for EVNT->xAOD (the existing one is only for GEN_AOD HepMC which needs to be treated differently)