Run3 trig feature access test6
Introduced python switch doRun2 to execute either Run2 or Run3 input files. Introduced new Run2 and Run3 input files generated by the standard test_trigAna_q221_RDOtoAOD_build.sh and test_trigAna_q221_RDOtoAOD_mt1_build.sh macros, respectively. Introduced option to read b-jet trigger chain names as input independently of the TrigHLTMonitoring package. All these updates are needed as outlined in ATR-19453, ATR-20079, ATR-20006 and ATR-19976.