Update cluster resolutions in PrStoreFTHit

So far cluster resolutions in PrStoreFTHit are based on an educated guess. This MR adds new updated resolutions following a fit performed in a dedicated python code located in Boole/lohenry-studyClusters. The default is still the old values and the updated can be used by setting PrStoreFTHit.UpdatedResolutions = True.

Implemented values have been taken after applying a P > 1 GeV/c momentum cut, and they correspond either the RMS (size 0) or the width of the most relevant Gaussian.

Ideally they would be taken from a CondDB file (see #110), but in the meanwhile need to be updated.

Follows up from !1599 (closed)