Update test_MC16a_Digi_tf_configuration.py after !31664
Update test_MC16a_Digi_tf_configuration.py to add new TRT_DigitizationTool property added in !31664 (merged).
InDetTRTCalDbTool
was added in !31664 (merged) test_MC16a_Digi_tf_configuration.py
needs to be added to include this change. This should fix ATLASSIM-4492.