HLT2 DecReports overwrite HLT1 DecReports

Running HLT2 overwrites the DecReports of HLT1 as SourceID is not specified in the HltDecReportsWriter

https://gitlab.cern.ch/lhcb/Moore/-/blob/master/Hlt/Moore/python/Moore/config.py#L213

SourceID then defaults to 0

https://gitlab.cern.ch/lhcb/LHCb/-/blob/master/Hlt/HltDAQ/src/component/HltDecReportsWriter.h#L59