Add option for running Brunel on raw event input format 4.1
Add option for running Brunel on raw event input format 4.1 (required to perform re-processing of 2016 pHe data for deuterium reconstruction with TOF https://gitlab.cern.ch/lhcb/opg/-/issues/79#note_7937861 lhcb-dpa/prod-requests#48)