Updates to Rivet_i and TruthRivetUtils to support the version of Rivet in LCG_106a
Update syntax to support the version of Rivet_i in LCG106a cherry-picked from !69721 (merged) and !69893 (merged)
Relates to ATLINFR-5582
Update syntax to support the version of Rivet_i in LCG106a cherry-picked from !69721 (merged) and !69893 (merged)
Relates to ATLINFR-5582