Remove every last vestige of the old RegSelSvc class and the related RegionSelectorTable classes
Having replaced all the use of the old RegSelSvc but the new component specific RegSelTools and their related RegSelCondAlgs, we can now remove the remaining RegSelSvc code, and the componenet specific code for each RegionSelectorTable class, ie
InnerDetector/InDetDetDescr/InDetRegionSelector MuonSpectrometer/MuonDetDescr/MuonRegionSelector LArCalorimeter/LArRegionSelector TileCalorimeter/TileRawUtils
Some no longer necessary configuration code has also been removed - some further changes may be needed if there are vestiges remaining in obscure locations.
Relates to ATR-19657.