Muon readout granularity for Run 3
needed for merge request lhcb/LHCb!3133 (merged) lhcb/Boole!377 (merged) and SIMCOND!182 (merged)
Edited by Rosen Matev
needed for merge request lhcb/LHCb!3133 (merged) lhcb/Boole!377 (merged) and SIMCOND!182 (merged)