Draft: LineChart: Replace shader clipping with geometry-based clipping

Apparently shader-based clipping can cause artifacts on some GPUs (Intel). So instead of rendering the full height rect for a line chart segment and discarding fragments in the shader, resize the geometry of the SDF part so it is only used for the relevant part, anything above is discarded and anything below is rendered using a simple colored rectangle.

Draft because this introduces a rendering error for the last segment.