Cleaning up NvCloth gem. Removed any reference to LmbrCentral and legacy renderer since now it uses Atom. (#154)

- Removed any usage of LmbCentral and legacy renderer from NvCloth gem.
- Cloth rule can only be added to Mesh groups, not allowed in Actor groups anymore.
- Removed ActorAssetHelper since actors now share the mesh model format and therefore they also use MeshAssetHelper.
- Updated NvCloth gem.json file with the fields from the template.
- Updated cloth chicken asset to not convert axis.

Gems/NvCloth/Code/Source/Module.cpp

@@ -25,7 +25,6 @@
 #include <Editor/EditorSystemComponent.h>
 #include <Components/EditorClothComponent.h>
 #include <Pipeline/SceneAPIExt/ClothRuleBehavior.h>
-#include <Pipeline/RCExt/CgfClothExporter.h>
 #endif //NVCLOTH_EDITOR
 
 namespace NvCloth
@@ -59,7 +58,6 @@ namespace NvCloth
                 EditorSystemComponent::CreateDescriptor(),
                 EditorClothComponent::CreateDescriptor(),
                 Pipeline::ClothRuleBehavior::CreateDescriptor(),
-                Pipeline::CgfClothExporter::CreateDescriptor(),
 #endif //NVCLOTH_EDITOR
             });
         }