Determines the Animancer.Editor.AnimationBindings.MatchType representing the properties animated by the `state` in comparison to the properties that actually exist on the target Animancer.Editor.AnimationBindings.BindingData.GameObject and its children.

Also compiles a `message` explaining the differences if that paraneter is not null.

public AnimationBindings.MatchType GetMatchType(Animator animator, AnimancerState state, StringBuilder message, bool forceGather = true)