### 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)

"""Test labels are correctly applied on all objects created by this chart"""
        release_name = "test-basic"
        k8s_objects = render_chart(
            name=release_name,
            values={
                "labels": {"label1": "value1", "label2": "value2"},
                "executor": "CeleryExecutor",
                "data": {
                    "resultBackendConnection": {
                        "user": "someuser",
                        "pass": "somepass",
                        "host": "somehost",
                        "protocol": "postgresql",
                        "port": 7777,
                        "db": "somedb",
                        "sslmode": "allow",
                    }
                },
                "pgbouncer": {"enabled": True},
                "redis": {"enabled": True},
                "ingress": {"enabled": True},
                "networkPolicies": {"enabled": True},
                "cleanup": {"enabled": True},
                "flower": {"enabled": True},
                "dagProcessor": {"enabled": True},