**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
("--reset-dagruns",),
    help=(
        "if set, the backfill will delete existing "
        "backfill-related DAG runs and start "
        "anew with fresh, running DAG runs"),
    action="store_true")
ARG_RERUN_FAILED_TASKS = Arg(
    ("--rerun-failed-tasks",),
    help=(
        "if set, the backfill will auto-rerun "
        "all the failed tasks for the backfill date range "
        "instead of throwing exceptions"),
    action="store_true")
ARG_RUN_BACKWARDS = Arg(
    ("-B", "--run-backwards",),
    help=(
        "if set, the backfill will run tasks from the most "
        "recent day first.  if there are tasks that depend_on_past "
        "this option will throw an exception"),
    action="store_true")
ARG_SHOW_DAGRUN = Arg(
    ("--show-dagrun", ),
    help=(
        "After completing the backfill, shows the diagram for current DAG Run.\n"
        "\n"
        "The diagram is in DOT language\n"),
    action='store_true')
ARG_IMGCAT_DAGRUN = Arg(
    ("--imgcat-dagrun", ),
    help=(