Move host and port to be Host and Port with validation

[This line](https://github.com/airflow-laminar/airflow-supervisor/blob/1a3b072715d7e7955f0185cfe5ecd89e9243ee20/airflow_supervisor/tests/hydra/test_hydra.py#L173)

and [this line](https://github.com/airflow-laminar/airflow-supervisor/blob/1a3b072715d7e7955f0185cfe5ecd89e9243ee20/airflow_supervisor/tests/hydra/test_hydra.py#L199)

should be the same