contains MRs: Sherpa_i: Replace some hard-coded paths in sherpaTarCreator https://gitlab.cern.ch/atlas/athena/-/merge_requests/43904 Sherpa_i: Add hint for different sqrt(s) https://gitlab.cern.ch/atlas/athena/-/merge_requests/43986 Sherpa_i: update Ol default branch in tarCreator https://gitlab.cern.ch/atlas/athena/-/merge_requests/44169 added 21.6 ART tests for the generators https://gitlab.cern.ch/atlas/athena/-/merge_requests/44217 Adding MultiCjetFilter https://gitlab.cern.ch/atlas/athena/-/merge_requests/44378 Updates in PowhegControl documentation https://gitlab.cern.ch/atlas/athena/-/merge_requests/44383