[keyserver] Adding tunnelbroker-client to the keyserver napi-rs dependencies

Summary:
This diff introduces the integration of the shared Tunnelbroker-client Rust library into the keyserver using the napi-rs as a dependency.
We are updating the Cargo.toml file for the rust-node-addon and updating the Dockerfile to copy the tunnelbroker-client shared library inside the container.

Linear task: ENG-2729

Test Plan: All services should be built successfully according to the CI.

Reviewers: varun, bartek

Reviewed By: varun

Subscribers: jon, ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6283