Fixing cloth working with Actors by reading directly from ModelAsset instead from EMFX Mesh. (#235)

- Fixing cloth working with Actors by reading directly from ModelAsset instead from EMFX Mesh.
- Actor caches map from joint indices in skin metadata to skeleton indices so they can be query later.
- Actor cloth skinning reads indices and weights from Model Asset instead from EMFX Mesh.
- Actor cloth skinning with unlimited skinning bones.
- Sort out cloth unit tests by disabling them until there is a way to create an Atom mesh
- Addressing feedback.

Gems/NvCloth/Code/Tests/Components/ClothComponentTest.cpp

@@ -196,7 +196,7 @@ namespace UnitTest
         {
             auto actor = AZStd::make_unique<ActorHelper>("actor_test");
             auto meshNodeIndex = actor->AddJoint(meshNodeName);
-            actor->SetMesh(lodLevel, meshNodeIndex, CreateEMotionFXMesh(meshVertices, meshIndices, meshSkinningInfo, meshUVs, meshClothData));
+            actor->SetMesh(lodLevel, meshNodeIndex, CreateEMotionFXMesh(meshVertices, meshIndices, meshSkinningInfo, meshUVs/*, meshClothData*/));
             actor->FinishSetup();
 
             actorComponent->SetActorAsset(CreateAssetFromActor(AZStd::move(actor)));