Refactor attribute handling on the shader generator (#4565)

* Refactor attribute handling on the shader generator

* Implement gl_ViewportMask[]

* Add back the Intel FrontFacing bug workaround

* Fix GLSL transform feedback outputs mistmatch with fragment stage

* Shader cache version bump

* Fix geometry shader recognition

* PR feedback

* Delete GetOperandDef and GetOperandUse

* Remove replacements that are no longer needed on GLSL compilation on Vulkan

* Fix incorrect load for per-patch outputs

* Fix build

Ryujinx.Graphics.Shader/IntermediateRepresentation/IoVariable.cs

@@ -0,0 +1,51 @@
+namespace Ryujinx.Graphics.Shader.IntermediateRepresentation
+{
+    enum IoVariable
+    {
+        Invalid,
+
+        BackColorDiffuse,
+        BackColorSpecular,
+        BaseInstance,
+        BaseVertex,
+        ClipDistance,
+        CtaId,
+        DrawIndex,
+        FogCoord,
+        FragmentCoord,
+        FragmentOutputColor,
+        FragmentOutputDepth,
+        FragmentOutputIsBgra, // TODO: Remove and use constant buffer access.
+        FrontColorDiffuse,
+        FrontColorSpecular,
+        FrontFacing,
+        InstanceId,
+        InstanceIndex,
+        InvocationId,
+        Layer,
+        PatchVertices,
+        PointCoord,
+        PointSize,
+        Position,
+        PrimitiveId,
+        SubgroupEqMask,
+        SubgroupGeMask,
+        SubgroupGtMask,
+        SubgroupLaneId,
+        SubgroupLeMask,
+        SubgroupLtMask,
+        SupportBlockViewInverse, // TODO: Remove and use constant buffer access.
+        SupportBlockRenderScale, // TODO: Remove and use constant buffer access.
+        TessellationCoord,
+        TessellationLevelInner,
+        TessellationLevelOuter,
+        TextureCoord,
+        ThreadId,
+        ThreadKill,
+        UserDefined,
+        VertexId,
+        VertexIndex,
+        ViewportIndex,
+        ViewportMask
+    }
+}