**Update**

We discussed and decide this CLI should always only clean up pods created by Airflow.

<hr>

### Description

Currently command `kubernetes cleanup-pods` cleans up Pods that meet specific conditions in a given namespace.

Underlying code: https://github.com/apache/airflow/blob/2.0.1/airflow/cli/commands/kubernetes_command.py#L70

### Use case / motivation

The problem to me is: users may have other non-Airflow stuff running in this specific namespace, and they may want to have different strategy/logic for Pod cleaning-up for these non-Airflow pods.

We may want to have an additional boolean flag for this command, like `--only-airflow-pods`, so that users can decide if they only want to clean up Airflow-created Pods.

It should not be hard to identify Airflow-created pods, given the specific labels Airflow adds to the Pods it creates (https://github.com/apache/airflow/blob/2.0.1/airflow/kubernetes/pod_generator.py#L385)




airflow/cli/cli_parser.py
"""ClI command with subcommands"""
    name: str
    help: str
    subcommands: Iterable
    description: Optional[str] = None
    epilog: Optional[str] = None
CLICommand = Union[ActionCommand, GroupCommand]
DAGS_COMMANDS = (
    ActionCommand(
        name='list',
        help="List all the DAGs",
        func=lazy_load_command('airflow.cli.commands.dag_command.dag_list_dags'),
        args=(ARG_SUBDIR, ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name='report',
        help='Show DagBag loading report',
        func=lazy_load_command('airflow.cli.commands.dag_command.dag_report'),
        args=(ARG_SUBDIR, ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name='list-runs',
        help="List DAG runs given a DAG id",
        description=(