Add LArSamplesMon package to athena

This MR concerns the implementation of the LArSamplesMon package with changes and migration to release 22. This package contains tools to read ntuples and create histograms to study the LAr pulse shapes and FEBs timing. More documentation about this package can be found on the twiki: https://twiki.cern.ch/twiki/bin/view/LAr/LArSamplesMon

Tagging @pavol and @wlampl to follow up as well on this MR.