run track fit on preselected Long and Downstream tracks only

Moore configuration for the track fit.

• Fit Long and Downstream tracks only
• Additional pre-fit selection of tracks PT>100 MeV & P>2 GeV is performed
• Perform the fit by TrackEventFitter instead of TrackBestTrackCreator. The later is used in no-fit mode only.
• Introduce tracks containers: FittedLong, FittedDownstream, SoftLong, SoftDownstream
• Best container to be removed

As the clone killing is done differently, the number of Downstream tracks is ~0.5% less.

Timing: speeds up the track fit by ~30 % (valgrind)

Depends on Rec!2060 (merged)

To be merged after !393 (merged)