[services] Upgrading Rust Tonic crate version to 0.8 and Prost to 0.11

Summary:
Update the Rust Tonic crate to use the 0.8 version across all services.
To fix the gRPC generation error the prost should be upgraded as well.
The installation of the protoc compiler was added to the identity service Dockerfile.

Raised at D5264.
Related Linear task: ENG-1949

Test Plan: The services are successfully built.

Reviewers: jon, marcin, michal, varun, ashoat

Reviewed By: jon, varun, ashoat

Subscribers: ashoat, tomek, atul, abosh

Differential Revision: https://phab.comm.dev/D5285