Move shader resource descriptor creation out of the backend (#2290)

* Move shader resource descriptor creation out of the backend

* Remove now unused code, and other nits

* Shader cache version bump

* Nits

* Set format for bindless image load/store

* Fix buffer write flag

Ryujinx.Graphics.Gpu/Shader/ShaderCache.cs

@@ -36,7 +36,7 @@ namespace Ryujinx.Graphics.Gpu.Shader
         /// <summary>
         /// Version of the codegen (to be changed when codegen or guest format change).
         /// </summary>
-        private const ulong ShaderCodeGenVersion = 2261;
+        private const ulong ShaderCodeGenVersion = 2290;
 
         // Progress reporting helpers
         private volatile int _shaderCount;