AllenSelReportsToTES: Also copy DecReports to TES when copying SelReports

FYI @rmatev @sstahl @mvesteri @thboettc

In order for HltEfficiencyChecker to be able to calculate TOS efficencies for Allen, we need to be able to decode the SelReports from the TES. Luckily, this can be done by AllenSelReportsToTES.cpp and HltSelReportsDecoder, but unfortunately the latter requires that the DecReports exist in the same place as the SelReports. Therefore this MR gets AllenSelReportsToTES to also put the DecReports in the TES in the same RawEvent.

Required by MooreAnalysis!51 (merged), and thereby required if we want to present TOS efficiencies for Allen in the detector construction paper.