Propagated option for simplified geometry through upgrade tracking configuration

I added the options such that setting TrackSys().ExpertTracking = [ "simplifiedGeometry" ] switches on the simplified geometry for the fast and best stage in the upgrade tracking. It is off per default, as soon as it is available the logic can be reversed and it'll be switched on by default. @tnikodem , @adudziak, @sstahl any comments to this?