**Apache Airflow version**: 1.10.12

**Kubernetes version** : 1.17.9

**Environment**:

- **Cloud provider or hardware configuration**: Azure Kubernetes Service
- **OS** (e.g. from /etc/os-release): Linux
- **Install tools**: Helm chart (/chart in repo) 
- **Others**:

**What happened**:
Pod cannot run since `airflow-cleanup-pods` is not in $PATH
```
Error: failed to start container "airflow-cleanup-pods": Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"airflow-cleanup-pods\": executable file not found in $PATH": unknown
```

**What you expected to happen**: 
Cleanup job pod runs

<!-- What do you think went wrong? -->

**How to reproduce it**:
* Deploy Helm Chart
* Manually trigger `airflow-cleanup ` CronJob 
* See it cannot run since `airflow-cleanup-pods` is not in $PATH
airflow/cli/cli_parser.py
name="celery",
        help='Celery components',
        description=(
            'Start celery components. Works only when using CeleryExecutor. For more information, see '
            'https://airflow.readthedocs.io/en/stable/executor/celery.html'
        ),
        subcommands=CELERY_COMMANDS
    )
]
ALL_COMMANDS_DICT: Dict[str, CLICommand] = {sp.name: sp for sp in airflow_commands}
DAG_CLI_COMMANDS: Set[str] = {
    'list_tasks', 'backfill', 'test', 'run', 'pause', 'unpause', 'list_dag_runs'
}
class AirflowHelpFormatter(argparse.HelpFormatter):
    """
    Custom help formatter to display help message.
    It displays simple commands and groups of commands in separate sections.
    """
    def _format_action(self, action: Action):
        if isinstance(action, argparse._SubParsersAction):  
            parts = []
            action_header = self._format_action_invocation(action)
            action_header = '%*s%s\n' % (self._current_indent, '', action_header)
            parts.append(action_header)
            self._indent()
            subactions = action._get_subactions()  
            action_subcommands, group_subcommands = partition(
                lambda d: isinstance(ALL_COMMANDS_DICT[d.dest], GroupCommand), subactions
            )
            parts.append("\n")