In Rust, binary crates aren't meant to be IT-tested:
https://doc.rust-lang.org/book/ch11-03-test-organization.html#integration-tests-for-binary-crates

https://users.rust-lang.org/t/integration-tests-for-binary-crates/21373

This change aligns us better with Rust-s best practices.
Additionally, there won't be duplication
of run unit tests anymore.