Contains MRs: add TestLHE https://gitlab.cern.ch/atlas/athena/-/merge_requests/45341 correct ParticleGun common fragments to work in 21.6 https://gitlab.cern.ch/atlas/athena/-/merge_requests/45376 Setting the default sde_strategy in MadGraphControl https://gitlab.cern.ch/atlas/athena/-/merge_requests/45406 Pythia8.305 https://gitlab.cern.ch/atlas/athena/-/merge_requests/45437 patch tau filters for decay-less Sherpa status code 20 taus https://gitlab.cern.ch/atlas/athena/-/merge_requests/45453 improve PowhegControl VBF W,Z interface AGENE-1831 https://gitlab.cern.ch/atlas/athena/-/merge_requests/45492 Add four-top filter https://gitlab.cern.ch/atlas/athena/-/merge_requests/45501 PowhegControl: fix reweighting issue and expose parallelstage in some processes https://gitlab.cern.ch/atlas/athena/-/merge_requests/45526