HDRenderPipeline: Add a debug option to remove tessellation on materials (Lit and LayeredLit only)

Assets/ScriptableRenderPipeline/HDRenderPipeline/Editor/HDRenderPipelineMenuItems.cs

                 EditorUtility.ClearProgressBar();
             }
         }
+
+        [MenuItem("HDRenderPipeline/Remove tessellation materials (not reversible)")]
+        static void RemoveTessellationMaterials()
+        {
+            Object[] materials = Resources.FindObjectsOfTypeAll<Material>();
+
+            Shader litShader = Shader.Find("HDRenderPipeline/Lit");
+            Shader layeredLitShader = Shader.Find("HDRenderPipeline/LayeredLit");
+
+            foreach (Object obj in materials)
+            {
+                Material mat = obj as Material;
+                if (mat.shader.name == "HDRenderPipeline/LitTessellation")
+                {
+                    mat.shader = litShader;
+                    // We remove all keyword already present
+                    RemoveMaterialKeywords(mat);
+                    LitGUI.SetupMaterialKeywordsAndPass(mat);
+                    EditorUtility.SetDirty(mat);
+                }
+                else if (mat.shader.name == "HDRenderPipeline/LayeredLitTessellation")
+                {
+                    mat.shader = layeredLitShader;
+                    // We remove all keyword already present
+                    RemoveMaterialKeywords(mat);
+                    LayeredLitGUI.SetupMaterialKeywordsAndPass(mat);
+                    EditorUtility.SetDirty(mat);
+                }
+            }
+        }
     }
 }