Geometry3D.get_closest_point_to_segment() has inaccurate name

[chardish]

In the Geometry3D class, the function get_closest_point_to_segment(point, s1, s2) has an inaccurate name. Per the documentation, the function

Returns the 3D point on the 3D segment (s1, s2) that is closest to point. The returned point will always be inside the specified segment.

So this function doesn't get the closest point to a segment. It gets the closest point on the segment to point.

I'd recommend renaming this function get_closest_point_on_segment.

(Its sibling function, get_closest_point_to_segment_uncapped, has a similar issue and should be renamed get_closest_point_on_segment_uncapped.)

[AThousandShips]

Note that this can't be done until Godot 5.0 because it breaks compatibility

Also the same naming would apply to the 2D case