**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
),
)
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(
        name='pools',
        help="Manage pools",
        subcommands=POOLS_COMMANDS,
    ),
    GroupCommand(
        name='variables',
        help="Manage variables",
        subcommands=VARIABLES_COMMANDS,
    ),
    GroupCommand(
        name='db',