**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
help="Checks if job(s) are still alive",
        func=lazy_load_command('airflow.cli.commands.jobs_command.check'),
        args=(ARG_JOB_TYPE_FILTER, ARG_JOB_HOSTNAME_FILTER, ARG_JOB_LIMIT, ARG_ALLOW_MULTIPLE),
        epilog=(
            'examples:\n'
            'To check if the local scheduler is still working properly, run:\n'
            '\n'
            '    $ airflow jobs check --job-type SchedulerJob --hostname "$(hostname)"\n'
            '\n'
            'To check if any scheduler is running when you are using high availability, run:\n'
            '\n'
            '    $ airflow jobs check --job-type SchedulerJob --allow-multiple --limit 100'
        ),
    ),
)
airflow_commands: List[CLICommand] = [
    GroupCommand(
        name='dags',
        help='Manage DAGs',
        subcommands=DAGS_COMMANDS,
    ),
    GroupCommand(
        name="kubernetes", help='Tools to help run the KubernetesExecutor', subcommands=KUBERNETES_COMMANDS
    ),
    GroupCommand(
        name='tasks',
        help='Manage tasks',
        subcommands=TASKS_COMMANDS,
    ),
    GroupCommand(