fix ntuple code which was storing duplicate parameters for multi track events

There was an issue with multi track events where the subsequent tracks only had their parameters updated and stored if their momentum was larger than the previous track. This was because I had adopted this code from Brian where he was only storing the track with the largest momentum, and I accidentally left some of his code. (https://gitlab.cern.ch:8443/faser/calypso/-/blob/master/PhysicsAnalysis/NtupleDumper/src/NtupleDumperAlg.cxx#L783-787)

This MR fixes this and correctly stores the track parameters for each long track.