Fix 105271: Luminance Matte not Working on NVIDIA.

Issue was that the clamping parameters were not in
the correct order. This leads to undefined behavior
and also lead to small artifacts on other platforms.

Pull Request: https://projects.blender.org/blender/blender/pulls/105735

source/blender/compositor/realtime_compositor/shaders/library/gpu_shader_compositor_luminance_matte.glsl

@@ -8,7 +8,7 @@ void node_composite_luminance_matte(vec4 color,
                                     out float matte)
 {
   float luminance = get_luminance(color.rgb, luminance_coefficients);
-  float alpha = clamp(0.0, 1.0, (luminance - low) / (high - low));
+  float alpha = clamp((luminance - low) / (high - low), 0.0, 1.0);
   matte = min(alpha, color.a);
   result = color * matte;
 }