Main add in forward track particle for physlite

As was noticed in ATLASG-2534, Silicon-Associated-Forward-Muons have associated with them a special InDet track particle in InDetForwardTrackParticles. This container has been missing from PhysLite. These have 'trackless', mainly pixel hits/clusters I believe, which are used in the muon calibration for analyses. Without these tracks, the calibration is slightly different in the muon calib tool. Unfortunately, the tool doesn't complain about the missing track particles. So the problem was only found by comparing calibration of these muons between Phys and PhysLite. With this MR, the calibration agrees between the two. This change was agreed during the DAOD coord meeting during my talk.