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

FYI: @gunther , @mferrill , @powen

added DPA-WP3 Functors Tuples labels

requested review from @erodrigu and @pkoppenb

assigned to @amathad

mentioned in merge request Rec!2666 (closed)

mentioned in merge request Rec!2621 (closed)

mentioned in merge request Rec!2652 (merged)

mentioned in merge request Analysis!846 (merged)

approved this merge request