bug fix: clearing TMDB container everytime
As observed in ATLASRECTS-6690, TGC trigger simulation (TrigT1TGC) in 21.0 has a bug for the TMDB data handling, just the TMDB data were not cleared properly every time. The TMDB data container is used for the tile-muon coincidence which was activated only for the 2018 data-taking, thus this bug affects only mc20e. Note that the standard HLT chains are not affected because they use only CURRENT BC events where the clearing TMDB container is properly called. There would be only a minor effect on the LATE muon trigger (only a small region corresponding tile-muon coverage).