Implement HLE macros for render target clears (#3528)

* Implement HLE macros for render target clears

* Add constants for the offsets

Ryujinx.Graphics.Gpu/Engine/Threed/ThreedClass.cs

@@ -497,6 +497,17 @@ namespace Ryujinx.Graphics.Gpu.Engine.Threed
             return 0;
         }
 
+        /// <summary>
+        /// Clears the current color and depth-stencil buffers.
+        /// Which buffers should be cleared can also specified with the arguments.
+        /// </summary>
+        /// <param name="argument">Method call argument</param>
+        /// <param name="layerCount">For array and 3D textures, indicates how many layers should be cleared</param>
+        public void Clear(int argument, int layerCount)
+        {
+            _drawManager.Clear(this, argument, layerCount);
+        }
+
         /// <summary>
         /// Performs a indirect multi-draw, with parameters from a GPU buffer.
         /// </summary>