Geometry_Engine: SortAlongCurve (probably) should not cull the points that do not lie on the curve

[pawelbaran]

Description:

Currently SortAlongCurve method silently culls all points that do not lie on it, which is potentially dangerous and different from what such methods usually do in other geometry engines - the common approach is to sort the input points based on their correspondent closest points on the curve. Briefly discussed with @peterjamesnugent #3107 starting from this comment.

Warning: if the decision is made to stop culling the points, let's be careful because it is a breaking change and can affect the existing workflows.