**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
("-x", "--donot-pickle"),
    help=(
        "Do not attempt to pickle the DAG object to send over "
        "to the workers, just tell the workers to run their version "
        "of the code"),
    action="store_true")
ARG_BF_IGNORE_DEPENDENCIES = Arg(
    ("-i", "--ignore-dependencies"),
    help=(
        "Skip upstream tasks, run only the tasks "
        "matching the regexp. Only works in conjunction "
        "with task_regex"),
    action="store_true")
ARG_BF_IGNORE_FIRST_DEPENDS_ON_PAST = Arg(
    ("-I", "--ignore-first-depends-on-past"),
    help=(
        "Ignores depends_on_past dependencies for the first "
        "set of tasks only (subsequent executions in the backfill "
        "DO respect depends_on_past)"),
    action="store_true")
ARG_POOL = Arg(("--pool",), "Resource pool to use")
ARG_DELAY_ON_LIMIT = Arg(
    ("--delay-on-limit",),
    help=("Amount of time in seconds to wait when the limit "
          "on maximum active dag runs (max_active_runs) has "
          "been reached before trying to execute a dag run "
          "again"),
    type=float,
    default=1.0)
ARG_RESET_DAG_RUN = Arg(