TrackProjector: generalize by passing target surface as option

The current TrackProjector has some hardcoded assumptions, i.e. https://eicweb.phy.anl.gov/EIC/juggler/-/blob/master/JugTrack/src/components/TrackProjector.cpp#L128-129

          if (pathlength_at_reflayer<0 && volume==29 && layer==4 && trackstate.hasCalibrated()) pathlength_at_reflayer = pathlength; // 2nd outter barrel
          if (pathlength_at_reflayer<0 && pathlength>1700) pathlength_at_reflayer = pathlength; // endcap GEM layer

We should change this to be more generic.