Return an error if a request exceeds the maximum allowed size, instead of panicking

[tomaka]

Fix #317

[github-actions]

twiggy diff report

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

---

 Delta Bytes │ Item
─────────────┼────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
       +3597 ┊ smoldot_light::sync_service::SyncService<TPlat>::storage_query::{{closure}}::h15082c3c86cac6eb
       -3550 ┊ smoldot_light::sync_service::SyncService<TPlat>::storage_query::{{closure}}::h7314eba305ab632a
       +3362 ┊ smoldot_light::sync_service::SyncService<TPlat>::storage_query::{{closure}}::h311ea8c68b87434f
       -3291 ┊ smoldot_light::sync_service::SyncService<TPlat>::storage_query::{{closure}}::h1ca8ecd2286d85ea
       +1850 ┊ futures_util::abortable::Abortable<T>::try_poll::hf6a1a53196ac783b
       -1823 ┊ futures_util::abortable::Abortable<T>::try_poll::h919e7133a16178ce
        -407 ┊ smoldot::libp2p::connection::established::single_stream::SingleStream<TNow,TRqUd,TNotifUd>::add_request::h2cd1d3ed97c5c74a
        +403 ┊ smoldot::libp2p::collection::Network<TConn,TNow>::start_request::h349f9312fee43167
        +380 ┊ smoldot::libp2p::connection::established::single_stream::SingleStream<TNow,TRqUd,TNotifUd>::add_request::h9918907f4bea199c
        -367 ┊ smoldot::libp2p::connection::established::multi_stream::MultiStream<TNow,TSubId,TRqUd,TNotifUd>::add_request::hcc890fbc5f12bfea
        +340 ┊ smoldot::libp2p::connection::established::multi_stream::MultiStream<TNow,TSubId,TRqUd,TNotifUd>::add_request::h10cb88fc88fd077d
        -306 ┊ smoldot::libp2p::collection::Network<TConn,TNow>::start_request::hb54a6cb4a8e25e6c
        +305 ┊ <futures_util::future::select::Select<A,B> as core::future::future::Future>::poll::h2193adc856fd22b0
        -305 ┊ <futures_util::future::select::Select<A,B> as core::future::future::Future>::poll::h5195cced65f580d6
        +297 ┊ <alloc::vec::Vec<T,A> as core::clone::Clone>::clone::hffbc9eb53b25f2d8
        +278 ┊ smoldot::network::service::requests_responses::<impl smoldot::network::service::ChainNetwork<TNow>>::start_call_proof_request::h578cfca3731af80e
        +278 ┊ smoldot::network::service::requests_responses::<impl smoldot::network::service::ChainNetwork<TNow>>::start_call_proof_request::h7afed870dd3c6be2
        +278 ┊ smoldot::network::service::requests_responses::<impl smoldot::network::service::ChainNetwork<TNow>>::start_call_proof_request::hdb61daa74da9de20
        +278 ┊ smoldot::network::service::requests_responses::<impl smoldot::network::service::ChainNetwork<TNow>>::start_storage_proof_request::h63e0d31205be9449
        +278 ┊ smoldot::network::service::requests_responses::<impl smoldot::network::service::ChainNetwork<TNow>>::start_storage_proof_request::hdc2852f99b727a19
        -286 ┊ ... and 321 more.
       +1690 ┊ Σ [341 Total Rows]