### Official Helm Chart version

1.10.0 (latest released)

### Apache Airflow version

2.7.1

### Kubernetes Version

1.26.7

### Helm Chart configuration

_No response_

### Docker Image customizations

_No response_

### What happened

When enabling `dagProcessor.logGroomerSidecar`, our OPA gatekeeper flags the `dag-processor-log-groomer` container with the appropriate non-root permissions. There is no way to set the `securityContexts` for this sidecar as it is not even enabled.

### What you think should happen instead

The `securityContexts` setting for the `dag-processor-log-groomer` container should be configurable.

### How to reproduce

In the Helm values, set `dagProcessor.logGroomerSidecar` to `true`.

### Anything else

This problem occurs when there are OPA policies in place pertaining to strict `securityContexts` settings.

### 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)

docs = render_chart(
            values={"statsd": {"enabled": True, "uid": 3000}},
            show_only=["templates/statsd/statsd-deployment.yaml"],
        )
        assert 3000 == jmespath.search("spec.template.spec.securityContext.runAsUser", docs[0])
    def test_check_pgbouncer_uid(self):
        docs = render_chart(
            values={"pgbouncer": {"enabled": True, "uid": 3000}},
            show_only=["templates/pgbouncer/pgbouncer-deployment.yaml"],
        )
        assert 3000 == jmespath.search("spec.template.spec.securityContext.runAsUser", docs[0])
    def test_check_cleanup_job(self):
        docs = render_chart(
            values={"uid": 3000, "gid": 30, "cleanup": {"enabled": True}},
            show_only=["templates/cleanup/cleanup-cronjob.yaml"],
        )
        assert 3000 == jmespath.search(
            "spec.jobTemplate.spec.template.spec.securityContext.runAsUser", docs[0]
        )
        assert 30 == jmespath.search("spec.jobTemplate.spec.template.spec.securityContext.fsGroup", docs[0])
    def test_gitsync_sidecar_and_init_container(self):