Unify BatchConfigTransition and Transition types (#32783)

This is some overdue refactoring. The two types never made sense. It
also should be defined by isomorphic since it defines how it should be
used by renderers rather than isomorphic depending on Fiber.

Clean up hidden classes to be consistent.

Fix missing name due to wrong types. I choose not to invoke the
transition tracing callbacks if there's no name since the name is
required there.