Merge branch '21.2-HIGG2D1' into '21.2'

Add GSFTracksCPDetailedContent to HIGG2D1SlimmingHelper

See merge request atlas/athena!14106

Former-commit-id: 0b6694c981b3a4fb7a0e1a4aa2e7f70db6d5b8a6

PhysicsAnalysis/DerivationFramework/DerivationFrameworkHiggs/share/HIGG2D1.py

@@ -294,6 +294,7 @@ if DerivationFrameworkIsMonteCarlo:
 HIGG2D1SlimmingHelper.ExtraVariables = HIGG2D1ExtraContent
 from DerivationFrameworkEGamma.ElectronsCPDetailedContent import *
 HIGG2D1SlimmingHelper.ExtraVariables += ElectronsCPDetailedContent
+HIGG2D1SlimmingHelper.ExtraVariables += GSFTracksCPDetailedContent
 HIGG2D1SlimmingHelper.AllVariables = HIGG2D1ExtraContainers
 HIGG2D1SlimmingHelper.AppendToDictionary = {'BTagging_AntiKt4EMPFlow':'xAOD::BTaggingContainer',
                                             'BTagging_AntiKt4EMPFlowAux':'xAOD::BTaggingAuxContainer'}