Release notes for release/21.0.124

This is the list of merge requests that were included since the previous release release/21.0.123:

!41777 : PyEvtFilterFromFile - extention of PyEvtFilter functionality
!41766 : Sweeping !41744 from 21.3 to 21.0.
!41587 : Move G4particle_whitelist.txt to TruthUtils so that it is available in AthSimulation
!41282 : Fix reproducibility in FCS mpt getRand() by using TFCS custom hist classes
!41629 : Update default radius beyond which particles are considered as quasi-stable and make configurable
!41603 : Update particle flow in HeavyIon running
!41454 : Fix the switch of Tile-Muon coincidence with DB contents for MC16e (ATR-22584)
!41539 : removing tmdb simulation from RDOtoRDOTrig step
!41440 : Drop dumping of StoreGateSvc contents to the log in ReSimulation workflow
!41438 : Enable quasi-stable particle Simulation in the AthSimulation project
!41428 : Revert "Merge branch 'mhodgkin_HIPFlowJetClusters' into '21.0'"
!41258 : Update HeavyIon PFO cluster links
!41154 : Sweeping !41051 from 21.2 to 21.0.
!41202 : Clean-up test_ReSimulation.sh (ATLASSIM-5083)
!40971 : mpt PDFcreator getRand() pass by reference to map comparators
!36219 : Bugfix for truth local x position of the particle in the cluster