HDRenderPipeline: Don't do depth pyramid if no refraction

ScriptableRenderPipeline/HDRenderPipeline/HDRP/HDRenderPipeline.cs

 
         void RenderPyramidDepth(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, FullScreenDebugMode debugMode)
         {
+            if (!m_FrameSettings.enableRoughRefraction)
+                return;
+
             using (new ProfilingSample(cmd, "Pyramid Depth", CustomSamplerId.PyramidDepth.GetSampler()))
             {
                 var depthPyramidDesc = m_DepthPyramidBufferDesc;