### Apache Airflow version

2.2.5 (latest released)

### What happened

Helm installation fails with the following config:

``` 
postgresql:
  enabled: true
  nameOverride: overridename
```

The problem is manifested in the `-airflow-metadata` secret where the connection string will be generated without respect to the `nameOverride`

With the example config the generated string should be:

`postgresql://postgres:postgres@myrelease-overridename:5432/postgres?sslmode=disable`

but the actual string generated is:
`postgresql://postgres:postgres@myrelease-overridename.namespace:5432/postgres?sslmode=disable`




### What you think should happen instead

Installation should succeed with correctly generated metadata connection string

### How to reproduce

To reproduce just set the following in values.yaml and attempt `helm install`

``` 
postgresql:
  enabled: true
  nameOverride: overridename
```

### Operating System

Ubuntu

### Versions of Apache Airflow Providers

_No response_

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

using helm with kind cluster

### Anything else

_No response_

### 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)

"labels": {"label1": "value1", "label2": "value2"},
                "executor": "CeleryExecutor",
                "dagProcessor": {"enabled": True},
                "pgbouncer": {"enabled": True},
                "redis": {"enabled": True},
                "networkPolicies": {"enabled": True},
                "cleanup": {"enabled": True},
                "flower": {"enabled": True},
                "postgresql": {"enabled": False},  
            },
        )
        dict_of_labels_in_job_templates = {
            k8s_object["metadata"]["name"]: k8s_object["spec"]["template"]["metadata"]["labels"]
            for k8s_object in k8s_objects
            if k8s_object["kind"] == "Job"
        }
        kind_names_tuples = [
            (f"{release_name}-create-user", "create-user-job"),
            (f"{release_name}-run-airflow-migrations", "run-airflow-migrations"),
        ]
        for k8s_object_name, component in kind_names_tuples:
            expected_labels = {
                "label1": "value1",
                "label2": "value2",
                "tier": "airflow",
                "release": release_name,
                "component": component,
            }
            assert dict_of_labels_in_job_templates.get(k8s_object_name) == expected_labels
    def test_annotations_on_airflow_pods_in_deployment(self):