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/Decoders/FunctionType.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.Graphics.Shader.Decoders
+{
+    enum FunctionType : byte
+    {
+        User,
+        Unused,
+        BuiltInFSIBegin,
+        BuiltInFSIEnd
+    }
+}