Make sure connected addresses are inserted when discovering

[tomaka]

Fix #2568

This PR makes sure that, when we discover a peer that we're already connected to, we insert the addresses we're connected to or connecting to.

[mergify]

Automatically approving tomaka's pull requests. This auto-approval will be removed once more maintainers are active.

[github-actions]

twiggy diff report

Difference in .wasm size before and after this pull request.

---

 Delta Bytes │ Item
─────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────
        +568 ┊ smoldot::network::service::ChainNetwork<TNow>::discover::h9dfbd6e59d5a59a6
        +566 ┊ smoldot::network::service::ChainNetwork<TNow>::discover::h221aafab68ab946a
        +542 ┊ smoldot::network::service::ChainNetwork<TNow>::discover::h1185cbf11512b681
        +197 ┊ smoldot::libp2p::peers::Peers<TConn,TNow>::established_peer_connections::hf0298eecb2df704a
        +197 ┊ smoldot::libp2p::peers::Peers<TConn,TNow>::handshaking_peer_connections::h18be7735583b0fab
        +192 ┊ data[0]
        +148 ┊ smoldot::network::service::addresses::Addresses::set_pending::h3036ff59479c96db
        +123 ┊ <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::try_fold::h55e99a91dac9e400
        +123 ┊ <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::try_fold::h965a1b680b0606a4
        +102 ┊ <either::Either<L,R> as core::iter::traits::iterator::Iterator>::next::h768c62e5b027d855
        +102 ┊ <either::Either<L,R> as core::iter::traits::iterator::Iterator>::next::hb059e47988cd4313
         +79 ┊ smoldot::libp2p::peers::Peers<TConn,TNow>::connection_state::h0dceef2c65dac98b
         +71 ┊ core::ops::function::impls::<impl core::ops::function::FnMut<A> for &mut F>::call_mut::hc5e2f30547a04708
         +70 ┊ core::ops::function::impls::<impl core::ops::function::FnMut<A> for &mut F>::call_mut::h220f725340e8bb5c
       +4275 ┊ Σ [14 Total Rows]