Add support for fragment shader interlock (#2768)

* Support coherent images

* Add support for fragment shader interlock

* Change to tree based match approach

* Refactor + check for branch targets and external registers

* Make detection more robust

* Use Intel fragment shader ordering if interlock is not available, use nothing if both are not available

* Remove unused field

Ryujinx.Graphics.Shader/TextureUsageFlags.cs

@@ -13,6 +13,7 @@ namespace Ryujinx.Graphics.Shader
         // Integer sampled textures must be noted for resolution scaling.
         ResScaleUnsupported = 1 << 0,
         NeedsScaleValue = 1 << 1,
-        ImageStore = 1 << 2
+        ImageStore = 1 << 2,
+        ImageCoherent = 1 << 3
     }
 }