fix forward-compatibility of NormalBufferBlurPass (2021.2+, tested against 2021.2.0b6)

Runtime/CustomPass/NormalBufferBlurPass.cs

 using UnityEngine.Profiling;
 using UnityEngine.Rendering;
 using UnityEngine.Rendering.HighDefinition;
+#if UNITY_2021_2_OR_NEWER
+using UnityEngine.Rendering.RendererUtils;
+#else
+#endif
 #if UNITY_2020_2_OR_NEWER
 using UnityEngine.Experimental.Rendering.RenderGraphModule;
 #endif
 		RenderTargetIdentifier[] dbufferNormalMaskRTIDs;
 
 #if UNITY_2020_2_OR_NEWER
+	#if !UNITY_2021_2_OR_NEWER
+	#endif
+	#if !UNITY_2021_2_OR_NEWER
+	#endif
 			{
 				if (cachedField_m_DBufferOutput_mrt != null && cachedValue_m_DBufferOutput != null)
 				{
 			}
 		}
 #endif
-		
+
 		void FindDBufferNormalMaskRTIDs(HDRenderPipeline hdPipeline)
 		{
 			dbufferNormalMaskRTIDs = null;
+	#if !UNITY_2021_2_OR_NEWER
+	#endif
 			{
 				var field_m_DBufferOutput = typeof(HDRenderPipeline).GetField("m_DBufferOutput", BindingFlags.NonPublic | BindingFlags.Instance);
 				if (field_m_DBufferOutput != null)
 							{
 								dbufferNormalMaskRTIDs = new RenderTargetIdentifier[2];
 
+	#if !UNITY_2021_2_OR_NEWER
+	#endif
 								cachedField_m_DBufferOutput_mrt = field_mrt;
 								cachedValue_m_DBufferOutput = value_m_DBufferOutput;
 
 			}
 #endif
 
+#if !UNITY_2021_2_OR_NEWER
 			var field_m_DbufferManager = typeof(HDRenderPipeline).GetField("m_DbufferManager", BindingFlags.NonPublic | BindingFlags.Instance);
 			if (field_m_DbufferManager != null)
 			{
 					}
 				}
 			}
+#endif
 		}
 
 		static bool EnsureMaterial(ref Material material, string shaderName)
 				excludeObjectMotionVectors = false,
 			};
 
-#if UNITY_2020_2_OR_NEWER
+#if UNITY_2021_2_OR_NEWER
+			CoreUtils.DrawRendererList(renderContext, cmd, renderContext.CreateRendererList(renderListDesc));
+#elif UNITY_2020_2_OR_NEWER
 			CoreUtils.DrawRendererList(renderContext, cmd, RendererList.Create(renderListDesc));
 #else
 			HDUtils.DrawRendererList(renderContext, cmd, RendererList.Create(renderListDesc));