Align testbeam reconstruction and full LDMX simulation reconstruction

[bryngemark]

In the testbeam data analysis development, we used a separate path for hit and cluster reconstruction (with producers called TestBeamHitProducer... etc) compared to in the usual LDMX simulations. It would be great to make one producer work for both cases. The real difference is that there are quality flags set in data, and potentially some other info that we need to propagate. There is also no truth info like the beam electron fraction of the hit energy deposition. If the isData_ boolean gets set properly, we could likely deal with theses minor differences in a single producer for hits and clusters, respectively. This will help getting us ready for data taking, too.