contains MRs: https://gitlab.cern.ch/atlas/athena/-/merge_requests/47989 Update Herwig7HepMC.cxx to define legacy preprocessor directiv https://gitlab.cern.ch/atlas/athena/-/merge_requests/48034 Update FixHepMC.cxx https://gitlab.cern.ch/atlas/athena/-/merge_requests/48053 Corrected errors in the ART test https://gitlab.cern.ch/atlas/athena/-/merge_requests/48076 GeneratorFilters: Fix clang warnings. https://gitlab.cern.ch/atlas/athena/-/merge_requests/48086 Set cross-sections for events produced with EPOS and QGSjet https://gitlab.cern.ch/atlas/athena/-/merge_requests/48089 Sweeping !48079 from 21.6 to master. PowhegControl: fixes for ttjMiNNLOPS - AGENE-2055 https://gitlab.cern.ch/atlas/athena/-/merge_requests/48092 Port of fixes from HepMC3 branch into master