Merge branch '21.3' of https://gitlab.cern.ch:8443/atlas/athena into...

Event/xAOD/xAODTrigL1Calo/Root/JGTowerAuxContainer_v1.cxx

Event/xAOD/xAODTrigL1Calo/Root/JGTower_v1.cxx

...igL1Calo/xAODTrigL1Calo/versions/JGTowerAuxContainer_v1.h

.../xAOD/xAODTrigL1Calo/xAODTrigL1Calo/versions/JGTower_v1.h

...gitization/sTGC_Digitization/src/sTgcDigitizationTool.cxx

Simulation/G4Extensions/RHadrons/CMakeLists.txt

Simulation/G4Extensions/RHadrons/cmt/requirements

Simulation/G4Extensions/RHadrons/python/RHadronMasses.py

.../ISF_Validation/test/ISF_Validation_TestConfiguration.xml

...ion/ISF/ISF_Validation/test/test_MC16_ATLFASTIIF_ttbar.sh

...tion/ISF/ISF_Validation/test/test_MC16_ATLFASTII_ttbar.sh

...tion/ISF/ISF_Validation/test/test_MC16_FullG4_QS_ttbar.sh

Simulation/ISF/ISF_Validation/test/test_MC16_FullG4_ttbar.sh

...n/ISF/ISF_Validation/test/test_MC16_FullG4_ttbar_2evts.sh

...ests/SimCoreTests/test/SimCoreTests_TestConfiguration.xml

...lation/Tests/SimCoreTests/test/test_MC16_AtlasG4_ttbar.sh

Tools/DirectIOART/generateARTtests.py

...RT/test/test_directioart_analysisbase_xaodchecker_davs.sh

...T/test/test_directioart_analysisbase_xaodchecker_https.sh

...RT/test/test_directioart_analysisbase_xaodchecker_root.sh