refactor: Improve logging for failed p2p connection

[dima74]

Currently if peer can't establish connection with another peer, we will have such warning in logs:

  WARN iroha_p2p::peer::run: Failure during handshake., error: Io(Os { code: 111, kind: ConnectionRefused, message: "Connection refused" })
at crates/iroha_p2p/src/peer.rs:133
in iroha_p2p::peer::run::run with conn_id: 0
in iroha_p2p::network::run with listen_addr: 127.0.0.1:1337, public_key: ed012003415E0E516BE83870CE5A2165605E8719216B5ECCCE4AEDFB0B2B77862B3798

Note that there is no information about the remote peer, only about current peer (127.0.0.1:1337 is current peer address). This PR adds remote address to the log message:

  WARN iroha_p2p::peer::run: Failure during handshake., error: Io(Os { code: 111, kind: ConnectionRefused, message: "Connection refused" })
at crates/iroha_p2p/src/peer.rs:133
in iroha_p2p::peer::run::run with connection: "outgoing to 127.0.0.1:1338", conn_id: 0
in iroha_p2p::network::run with listen_addr: 127.0.0.1:1337, public_key: ed012003415E0E516BE83870CE5A2165605E8719216B5ECCCE4AEDFB0B2B77862B3798

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Also slightly refactored logic of PeersGossiper so that NetworkBase::current_peers_addresses will not contain current peer address (no behaviour changes, but improves debugging)