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/StructuredIr/AstTextureOperation.cs

@@ -27,10 +27,5 @@ namespace Ryujinx.Graphics.Shader.StructuredIr
             CbufSlot = cbufSlot;
             Handle = handle;
         }
-
-        public AstTextureOperation WithType(SamplerType type)
-        {
-            return new AstTextureOperation(Inst, type, Format, Flags, CbufSlot, Handle, Index);
-        }
     }
 }