### 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)

ctx_value = {"allowPrivilegeEscalation": False}
        docs = render_chart(
            values={
                "pgbouncer": {
                    "enabled": True,
                    "metricsExporterSidecar": {"securityContexts": {"container": ctx_value}},
                },
            },
            show_only=["templates/pgbouncer/pgbouncer-deployment.yaml"],
        )
        assert ctx_value == jmespath.search("spec.template.spec.containers[1].securityContext", docs[0])
    
    def test_worker_kerberos_container_setting(self):
        ctx_value = {"allowPrivilegeEscalation": False}
        docs = render_chart(
            values={
                "workers": {
                    "kerberosSidecar": {"enabled": True, "securityContexts": {"container": ctx_value}}
                },
            },
            show_only=["templates/workers/worker-deployment.yaml"],
        )
        assert ctx_value == jmespath.search("spec.template.spec.containers[2].securityContext", docs[0])
    
    def test_wait_for_migrations_init_container_setting(self):