feat(tonic): Extract transport error source when creating Status

[Guiguiprim]

Motivation

When experiencing transport errors the status object doesn't give much useful information: Status { code: Unknown, message: "transport error", source: None }.

"transport error" is the display message for tonic::transport::error::Error of kind tonic::transport::error::Kind::Transport.
tonic::transport::error::Error contains a source field which could give more information about the underlying issue but is not included in the display message nor extracted into the status object.

Solution

When creating a Status from an Box<dyn Error> we tries to extract the source data if it is a tonic::transport::error::Error.

[LucioFranco]

Hey! Seems like we hit the same issue :D Going to close this as I think #799 covers this use case a bit better since it just wraps all source instead of just transport ones.