Generate scaling helper functions on IR (#4714)

* Generate scaling helper functions on IR

* Delete unused code

* Split RewriteTextureSample and move gather bias add to an earlier pass

* Remove using

* Shader cache version bump

src/Ryujinx.Graphics.Shader/Translation/HelperFunctionName.cs

@@ -0,0 +1,11 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    enum HelperFunctionName
+    {
+        TexelFetchScale,
+        TextureSizeUnscale
+    }
+}