Optimize Animated Model rendering with hardware instancing

All models are using the same global buffer for skinned bones which allows to share shader binding for instancing.
Refactor draw call for batching skinned mesh draws.
Remove `SkinnedMeshDrawData` and merge it into `AnimatedModel` internals.

Source/Engine/Tools/MaterialGenerator/MaterialGenerator.cpp

@@ -487,7 +487,7 @@ bool MaterialGenerator::Generate(WriteStream& source, MaterialInfo& materialInfo
         switch (baseLayer->Domain)
         {
         case MaterialDomain::Surface:
-            srv = 3; // Objects + Skinning Bones + Prev Bones
+            srv = 2; // Objects + Skinning Bones
             break;
         case MaterialDomain::Decal:
             srv = 2; // Depth buffer + Stencil buffer