1. Enable AutoNATService on _all_ nodes by default. If it's an issue, we can disable it in RC3 but this will give us the best testing results. 2. Expose options to configure AutoNAT rate limiting.
Uses the new libp2p AutoNAT option.
closes #6391 License: MIT Signed-off-by: Raúl Kripalani <raul@protocol.ai>
License: MIT Signed-off-by: Łukasz Magiera <magik6k@gmail.com>