Move gl_Layer to vertex shader if geometry is not supported (#4368)

* Set gl_Layer on vertex shader if it's set on the geometry shader and it does nothing else

* Shader cache version bump

* PR feedback

* Fix typo

Ryujinx.Graphics.Shader/ShaderIdentification.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.Graphics.Shader
+{
+    public enum ShaderIdentification
+    {
+        None,
+        GeometryLayerPassthrough
+    }
+}