fix(ui): remove useless spacing in ruler and shape fiducials

Description

Remove apply_spacing config from ruler and shape fiducials service. When we create a ruler or a shape, the fiducial.contour_data are filled with coordinate points that already have been multiplied by the spacing. In this way, it's useless to multiply again coordinate points when we create objects in the scene.

How to test it?

For a complete test, this fix is used in a dependent merge-request.