Refactor shader GPU state and memory access (#1203)

* Refactor shader GPU state and memory access

* Fix NVDEC project build

* Address PR feedback and add missing XML comments

Ryujinx.Graphics.Shader/Instructions/InstEmitFArith.cs

@@ -431,7 +431,7 @@ namespace Ryujinx.Graphics.Shader.Instructions
 
                 if (scale.AsFloat() == 1)
                 {
-                    context.Config.PrintLog($"Invalid FP multiply scale \"{op.Scale}\".");
+                    context.Config.GpuAccessor.Log($"Invalid FP multiply scale \"{op.Scale}\".");
                 }
 
                 if (isFP64)