Make PhotonMakerAlg and MergedPi0Maker functional and enable lines with neutrals

PhotonMakerAlg and MergedPi0Maker are not functional. This prevents them from properly integrating with Moore. They do not declare their inputs and thus rely on objects being in a particular location. This works when running the lines from DST where objects are unpacked to predefined locations but not when running the reconstruction on the fly.

Once that is done the test hlt2_all_lines_with_reco.qmt should be updated to include lines with neutrals and the Jet lines.