### Description

The three commands:

```
              airflow users export /opt/airflow/dags/users.json &&
              airflow variables export /opt/airflow/dags/variables.json &&
              airflow connections export /opt/airflow/dags/connections.json
```

give back:

```
7 users successfully exported to /opt/airflow/dags/users.json
36 variables successfully exported to /opt/airflow/dags/variables.json
Connections successfully exported to /opt/airflow/dags/connections.json.
```


### Use case/motivation

Standardise output of "airflow connections export" to those of "airflow variables export" and "airflow users export"

### Related issues

_No response_

### Are you willing to submit a PR?

- [ ] 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)

"""Check if a URI is valid, by checking if scheme (conn_type) provided."""
    return urlsplit(uri).scheme != ""
@cache
def _get_connection_types() -> list[str]:
    """Return connection types available."""
    _connection_types = []
    providers_manager = ProvidersManager()
    for connection_type, provider_info in providers_manager.hooks.items():
        if provider_info:
            _connection_types.append(connection_type)
    return _connection_types
@providers_configuration_loaded
def connections_export(args):