### 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)

raise Exception("dummy exception")
        mock_create_session.side_effect = my_side_effect
        args = self.parser.parse_args(["connections", "export", output_filepath.as_posix()])
        with pytest.raises(Exception, match=r"dummy exception"):
            connection_command.connections_export(args)
    @mock.patch.object(connection_command, "create_session")
    def test_cli_connections_export_should_raise_error_if_fetching_connections_fails(
        self, mock_session, tmp_path
    ):
        output_filepath = tmp_path / "connections.json"
        def my_side_effect(_):
            raise Exception("dummy exception")
        mock_session.return_value.__enter__.return_value.query.return_value.order_by.side_effect = (
            my_side_effect
        )
        args = self.parser.parse_args(["connections", "export", output_filepath.as_posix()])
        with pytest.raises(Exception, match=r"dummy exception"):
            connection_command.connections_export(args)
    @mock.patch.object(connection_command, "create_session")
    def test_cli_connections_export_should_not_raise_error_if_connections_is_empty(
        self, mock_session, tmp_path
    ):
        output_filepath = tmp_path / "connections.json"
        mock_session.return_value.__enter__.return_value.query.return_value.all.return_value = []
        args = self.parser.parse_args(["connections", "export", output_filepath.as_posix()])
        connection_command.connections_export(args)
        assert output_filepath.read_text() == "{}"
    def test_cli_connections_export_should_export_as_json(self, tmp_path):