Job Failed #586572: sim_track_hits.cxx needs all tracker hit collections included again

Job #586572 failed for 844289cd:

In the transition to EDM4hep the hit collections were demultiplexed and the sim_track_hits.cxx was modified to only look at 1 of those multiple collections. We need to change that back so all hits are included.

assigned to @wdconinc

mentioned in commit a69edd56