Run3 trig feature access test2
This MR intends to replace MR 26274 addressing the comments of the MR shifter received for MR 26274. This MR concerns the Run-2 --> Run-3 migration of the b-jet trigger monitoring code. Details are given in a recent talk https://indico.cern.ch/event/833679/contributions/3493355/attachments/1876385/3089853/BjTrig_190708.pdf and in the JIRA tickets ATR-20006, ATR-19453 and ATR-20079.