* Move AnimDecodeCache lock managed to native
Should prevent crash if cache is accessed concurrently by native and managed at the same time.
* Also pass lock thrugh CalcLocalHierarchyAnimation
* Make sure nested bone merge hierarchies update correctly
* AddPoseOperation skip work when added transform is equal to identity
* SubtractPoseOperation skip work when added transform is equal to identity
* Fast path for BlendUpdateNode when weights are 1
Don't emit expensive pose op just forward the pose with weight 1
* Fast path for Blend2DUpdateNode when weights are 1
Don't emit expensive pose op just forward the pose with weight 1
* Avoid allocation of Actions in MergeDescendants
