This diff introduces adding the Tonic client initialization function for the Tunnelbroker into the Rust native library. The client instance would be passed to the client functions following [[ https://github.com/CommE2E/comm/blob/26f04572c8ec7fdfbd79c556dcf7c6615d9fc472/native/native_rust_library/src/identity_client.rs#L59 | the current approach ]].
Linear task: [[ https://linear.app/comm/issue/ENG-1333/implement-native-client-for-the-tunnelbroker-api-using-rust | ENG-1333 ]]