Blueprint Nativization Build Error Caused by Child Actor Component

A licensee upgraded their project to 4.18 and started to receive a compiler error when trying to build a project. This was tested in both their upgraded project and a fresh 4.18 project and the results were the same.

1. Create Three Blueprint actor Classes named ActorClassA, ActorClassB, and ActorClassC. ActorClassA parent class should be Actor, ActorClassB parent class should be ActorClassA, and ActorClassC parent class should be Actor
2. Add a Child Actor Component to ActorClassA, and set the child actor class to ActorClassC. Add a function to ActorClassC, and call it on the child actor inside of ActorClassB
3. Add an instance of ActorClassB to a map that is set to be packaged, and try to generate a package with blueprint nativization enabled (inclusive)

Result: A compiler error appears when attempting to package the project.

Fix UE-51650

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