impl Serialize/Deserialize for BoxError

Tarantool has a determined msgpack encoding format for BoxError, in particular the extended error info one. Currently we implemented the decoding part in network::protocol::codec::decode_extended_error. We just need to implement the encoding and use those to implement traits serde::Serialize, serde::Deserialize, and our custom Encode/Decode ones as well.

This will allow us to store BoxError in raft log entries for example when returning errors from multistage governor operations (picodata#662 (closed))

changed the description

changed milestone to %24.6 - Plugins and Tiers

marked this issue as related to picodata#662 (closed)

changed milestone to %24.7 - Datamart

added triaged label

changed milestone to %25.1

changed milestone to %25.3 - Single bucket transactions