feat: add new method get_uri for Endpoint

[Sherlock-Holo]

This PR adds a new method get_uri for Endpoint, to allow user to get the &Uri from an Endpoint

Motivation

I am using tonic and stored the Endpoint, ensure I can reconnect GRPC server directly, however sometimes I need to get the uri in Endpoint to print some log.

One way is to create a wrapper struct Endpoint(Uri, tonic::transport::Endpoint), but it will allocate a new Uri.

I think the better way is let Endpoint can return the Uri reference which is in the Endpoint, user can use it to print logs or do something else, without unnecessary allocating.

related issue is #370

[Sherlock-Holo]

the failed test makes me confused, I don't modify related codes.

Is there anyone who could tell me how to solve this problem? :(

[LucioFranco]

The error seems like a race condition with the OS letting go of the previous socket to allow the new one to bind. I reran the test to see if that fixes it.

[Sherlock-Holo]

the test is passed, thanks for your help :)

[LucioFranco]

Thanks!