### Description

Airflow Connection testing using airflow CLI would be very useful  , where users can quick add test function to test connection in their applications. It will benefit CLI user to create and test new connections right from instance and reduce time on troubleshooting any connection issue. 

### Use case/motivation

airflow connection testing using airflow CLI , similar function as we have in Airflow CLI. 
example:  airflow connection test "hello_id"

### Related issues

N/A

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

parser = cli_parser.get_parser()
    def setup_method(self):
        clear_db_connections(add_default_connections_back=False)
    @provide_session
    def test_cli_delete_connections(self, session=None):
        merge_conn(
            Connection(
                conn_id="new1",
                conn_type="mysql",
                description="mysql description",
                host="mysql",
                login="root",
                password="",
                schema="airflow",
            ),
            session=session,
        )
        
        with redirect_stdout(io.StringIO()) as stdout:
            connection_command.connections_delete(self.parser.parse_args(["connections", "delete", "new1"]))
            stdout = stdout.getvalue()
        
        assert "Successfully deleted connection with `conn_id`=new1" in stdout
        
        result = session.query(Connection).filter(Connection.conn_id == "new1").first()
        assert result is None
    def test_cli_delete_invalid_connection(self):