Update test with MC association and background category
This MR updates the HLT2 tupling test to showcase MC association and background category tupling.
Depends on Rec!2677 (merged), Analysis!851 (merged) and Analysis!855 (merged).
Related to issue: https://gitlab.cern.ch/lhcb-dpa/project/-/issues/145
Edited by Abhijit Mathad