Get rid of `libp2p` dependency in `sc-authority-discovery` (#5842)
## Issue #4859 ## Description This PR removes `libp2p` types in authority-discovery, and replace them with network backend agnostic types from `sc-network-types`. The `sc-network` interface is therefore updated accordingly. --------- Co-authored-by: Bastian Köcher <[email protected]> Co-authored-by: command-bot <> Co-authored-by: Dmitry Markin <[email protected]> Co-authored-by: Alexandru Vasile <[email protected]>