### 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)

with pytest.raises(CalledProcessError) as ex_ctx:
            render_chart(
                "test-basic",
                {
                    "executor": "SequentialExecutor",
                },
            )
        assert (
            'executor must be one of the following: "LocalExecutor", '
            '"LocalKubernetesExecutor", "CeleryExecutor", '
            '"KubernetesExecutor", "CeleryKubernetesExecutor"' in ex_ctx.value.stderr.decode()
        )
    @pytest.mark.parametrize(
        "image",
        ["airflow", "pod_template", "flower", "statsd", "redis", "pgbouncer", "pgbouncerExporter", "gitSync"],
    )
    def test_invalid_pull_policy(self, image):