### 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)

k8s_objects = render_chart(
            "test-basic",
            {
                "networkPolicies": {"enabled": True},
                "executor": "CeleryExecutor",
                "flower": {"enabled": True},
                "pgbouncer": {"enabled": True},
            },
        )
        kind_names_tuples = {
            (k8s_object["kind"], k8s_object["metadata"]["name"]) for k8s_object in k8s_objects
        }
        expected_kind_names = [
            ("NetworkPolicy", "test-basic-redis-policy"),
            ("NetworkPolicy", "test-basic-flower-policy"),
            ("NetworkPolicy", "test-basic-pgbouncer-policy"),
            ("NetworkPolicy", "test-basic-scheduler-policy"),
            ("NetworkPolicy", "test-basic-statsd-policy"),
            ("NetworkPolicy", "test-basic-webserver-policy"),
            ("NetworkPolicy", "test-basic-worker-policy"),
        ]
        for kind_name in expected_kind_names:
            assert kind_name in kind_names_tuples
    def test_labels_are_valid(self):