### Official Helm Chart version

1.1.0 (latest released)

### Apache Airflow version

2.1.3 (latest released)

### Kubernetes Version

1.18

### Helm Chart configuration

Any configuration should replicate this. Here is a simple example:

```
statsd:
  enabled: false 
redis:
  enabled: false
postgresql:
  enabled: false
dags:
  persistence:
    enabled: true
labels:
  sidecar.istio.iok/inject: "false"
```

### Docker Image customisations

Base image that comes with helm

### What happened

When I installed istio (/w istio proxy etc) on my namespace I noticed that the "apache-airflow-test-run-airflow-migrations" job would never fully complete. I was investigating and it seemed like the issue was with Istio so I tried creating a label in my values.yaml (as seen above) to disable to the istio inject - 
```
labels:
  sidecar.istio.iok/inject: "false"
```

The job picked up this label but when the job created the pod, the pod did not have this label.  It appears there's a mismatch between the job's and the pods' labels that it creates.

### What you expected to happen

I was thinking that any labels associated to job (from values.yaml) would be inherited in the corresponding pods created

### How to reproduce

1. Install istio on your cluster
2. Create a namespace and add this label to the namespace- `istio-injection: enabled`
3. Add this in your values.yaml `sidecar.istio.iok/inject: "false"` and deploy your helm chart
4. Ensure that your apache-airflow-test-run-airflow-migrations job has the istio inject label, but the corresponding apache-airflow-test-run-airflow-migrations-... pod does **not**

### Anything else

I have a fix for this issue in my forked repo [here](https://github.com/jlouk/airflow/commit/c4400493da8b774c59214078eed5cf7d328844ea)

I've tested this on my cluster and have ensured this removes the mismatch of labels between job and pod. The helm install continues without error. Let me know if there are any other tests you'd like me to run.

Thanks,
John

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

chart/tests/test_basic_helm_chart.py
(f"{release_name}-airflow-metadata", "Secret", None),
            (f"{release_name}-airflow-migrate-database-job", "ServiceAccount", "run-airflow-migrations"),
            (f"{release_name}-airflow-pgbouncer", "ServiceAccount", "pgbouncer"),
            (f"{release_name}-airflow-result-backend", "Secret", None),
            (f"{release_name}-airflow-redis", "ServiceAccount", "redis"),
            (f"{release_name}-airflow-scheduler", "ServiceAccount", "scheduler"),
            (f"{release_name}-airflow-statsd", "ServiceAccount", "statsd"),
            (f"{release_name}-airflow-webserver", "ServiceAccount", "webserver"),
            (f"{release_name}-airflow-worker", "ServiceAccount", "worker"),
            (f"{release_name}-broker-url", "Secret", "redis"),
            (f"{release_name}-cleanup", "CronJob", "airflow-cleanup-pods"),
            (f"{release_name}-cleanup-role", "Role", None),
            (f"{release_name}-cleanup-rolebinding", "RoleBinding", None),
            (f"{release_name}-create-user", "Job", "create-user-job"),
            (f"{release_name}-fernet-key", "Secret", None),
            (f"{release_name}-flower", "Deployment", "flower"),
            (f"{release_name}-flower", "Service", "flower"),
            (f"{release_name}-flower-policy", "NetworkPolicy", "airflow-flower-policy"),
            (f"{release_name}-pgbouncer", "Deployment", "pgbouncer"),
            (f"{release_name}-pgbouncer", "Service", "pgbouncer"),
            (f"{release_name}-pgbouncer-config", "Secret", "pgbouncer"),
            (f"{release_name}-pgbouncer-policy", "NetworkPolicy", "airflow-pgbouncer-policy"),
            (f"{release_name}-pgbouncer-stats", "Secret", "pgbouncer"),
            (f"{release_name}-pod-launcher-role", "Role", None),
            (f"{release_name}-pod-launcher-rolebinding", "RoleBinding", None),
            (f"{release_name}-pod-log-reader-role", "Role", None),
            (f"{release_name}-pod-log-reader-rolebinding", "RoleBinding", None),
            (f"{release_name}-redis", "Service", "redis"),
            (f"{release_name}-redis", "StatefulSet", "redis"),
            (f"{release_name}-redis-policy", "NetworkPolicy", "redis-policy"),