Lazy components suspend until resolved just like in Fizz. Add tests to confirm Lazy works with Shared Components and Client Component references.

React.Lazy can now return an element instead of a Component. This commit implements support for Lazy elements when server rendering.

adding lazying initialization toResolveModelToJson means we use attemptResolveElement's full logic on whatever the resolved type ends up being. This better aligns handling of misued Lazy types like a lazy element being used as a Component or a lazy Component being used as an element.