Create constructor for ConvexPolyline that does not remove any vertices

[Ughuuu]

• Fixes https://github.com/dimforge/parry/issues/277 In Godot Rapier, Godot sends vertices that it uses to draw the polygon. If Parry removes some vertices, then the physics will not work correct. We need the extra vertices even if collinear, and ideally have the collinearity check done in Godot at some point or sent as a warning to console. For now a function that accepts points and doesn't remove any is needed for this use case.