reverse the order in which HEXPLIT and topo-clustering take place

[sebouh137]

Is your feature request related to a problem? Please describe.
The topo clustering finds many "clusters" that belong to only on single real hit when it is being run on subcell hits from the output of the HEXPLIT algorithm. This happens because a single isolated hit will be divided into 12 subcell hits. The affected detectors are the foward HCAL insert (CALI) and the SiPM-on-tile ZDC.

Describe the solution you'd like

• Swap the order in which these two algorithms are run. Do this for both detectors
• Modify the expected input/output structure of HEXPLIT so that it can either run on all hits in a collection, or only on hits that belong to protoclusters in a collection of protoclusters (and produce a new protocluster collection in which each protocluster contains subcell hits instead of normal hits)
• Choose topo-cluster geometric parameters that are appropriate for hit-level instead of subcell-hit-level. Do this for both detectors

Describe alternatives you've considered
N/A

Additional context
N/A