Merge branch 'master_DFMCT_ART' into 'master'

Adding ART tests for truth derivations in master

See merge request !39438

PhysicsAnalysis/DerivationFramework/DerivationFrameworkART/DerivationFrameworkMCTruthART/test/test_mc15TRUTH0.sh

 #!/bin/sh
 
 # art-include: 21.2/AthDerivation
+# art-include: master/Athena
 # art-description: DAOD building TRUTH0 mc15
 # art-type: grid
 # art-output: *.pool.root

PhysicsAnalysis/DerivationFramework/DerivationFrameworkART/DerivationFrameworkMCTruthART/test/test_mc15TRUTH1.sh

 #!/bin/sh
 
 # art-include: 21.2/AthDerivation
+# art-include: master/Athena
 # art-description: DAOD building TRUTH1 mc15
 # art-type: grid
 # art-output: *.pool.root

PhysicsAnalysis/DerivationFramework/DerivationFrameworkART/DerivationFrameworkMCTruthART/test/test_mc15TRUTH3.sh

 #!/bin/sh
 
 # art-include: 21.2/AthDerivation
+# art-include: master/Athena
 # art-description: DAOD building TRUTH3 mc15
 # art-type: grid
 # art-output: *.pool.root