[Rllib] set self._allow_unknown_config (#17335)
[Rllib] set self._allow_unknown_config (#17335)

Co-authored-by: Sven Mika <dd860110a62b19214c4ee03aec0abffecb4e86b8@anyscale.io>
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray