Merged requested to merge nkakati/athena:hybrid-truth-tagging into 21.2
- Added the additional option of Hybrid Truth Tagging with GNN
- Hybrid Truth tagging = Direct tag the given flavor of jets and Truth tag the rest of the jets in the event.
- It first gets the efficiencies of all the jets the usual way, and if we are in the Hybrid tagging mode, it will replace the efficiencies of the jets for the given flavor with the Direct Tagging scores.
- The rest of the computation remains same.