

**Description**

We are using a 3rd party executor which has the ability to use multiple queues, however the `default_queue` is defined under the `celery` heading and is used regardless of the executor that you are using.

See: https://github.com/apache/airflow/blob/2.0.1/airflow/models/baseoperator.py#L366

It would be nice to decouple the default_queue configuration argument away from the celery section to allow other executors to utilise this functionality with less confusion.

**Are you willing to submit a PR?**

Yep! Will open a pull request shortly


**Related Issues**

Not that I'm aware of.

airflow/cli/cli_parser.py
"""Creates and returns command line argument parser"""
    parser = DefaultHelpParser(prog="airflow", formatter_class=AirflowHelpFormatter)
    subparsers = parser.add_subparsers(dest='subcommand', metavar="GROUP_OR_COMMAND")
    subparsers.required = True
    command_dict = DAG_CLI_DICT if dag_parser else ALL_COMMANDS_DICT
    subparser_list = command_dict.keys()
    sub_name: str
    for sub_name in sorted(subparser_list):
        sub: CLICommand = command_dict[sub_name]
        _add_command(subparsers, sub)
    return parser
def _sort_args(args: Iterable[Arg]) -> Iterable[Arg]:
    """Sort subcommand optional args, keep positional args"""
    def get_long_option(arg: Arg):