tcp: Merge open_connection into the negotiate_connection fn

[lexnv]

litep2p/src/transport/tcp/connection.rs

Lines 212 to 231 in e0b7118

	/// Open connection to remote peer at `address`.
	// TODO: this function can be removed
	pub(super) async fn open_connection(
	connection_id: ConnectionId,
	keypair: Keypair,
	stream: TcpStream,
	address: AddressType,
	peer: Option<PeerId>,
	yamux_config: crate::yamux::Config,
	max_read_ahead_factor: usize,
	max_write_buffer_size: usize,
	connection_open_timeout: Duration,
	substream_open_timeout: Duration,
	) -> Result<NegotiatedConnection, NegotiationError> {
	tracing::debug!(
	target: LOG_TARGET,
	?address,
	?peer,
	"open connection to remote peer",
	);