Match rust tests and the test model

[AlexStroke]

• [ ] Add Rust test cases on the test model
• [ ] Calculate subjective test coverage
• [ ] Find poorly covered places.

[appetrosyan]

Epic needs a bit more clarification, and added issues to python, java and js SDKs, so we can track progress.

[appetrosyan]

Need to create issue for Allure integration into Rust.