### Apache Airflow version

2.7.1

### What happened

Airflow's postgres connection configuration form has a field called  'schema'  which is misguiding as values mentioned here is used to refer to the database name instead of the schema name. It should be correctly named to 'database' or 'dbname'

### What you think should happen instead

_No response_

### How to reproduce

create a connection on the web UI and choose connection type as postgres.
Have a dag connect to an postgres server with multiple databases
provide the database name in the 'schema' field of the connection form- this would work if nothing else is incorrect in the etl
now change the value in the schema field of the connection form to refer to a schema- this will fail unexpectedly as the schema name field actually points to the database name.

### Operating System

Windows and Linux

### Versions of Apache Airflow Providers

2.71

### Deployment

Docker-Compose

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit 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)

try:
            from airflow.providers.amazon.aws.hooks.base_aws import AwsBaseHook
        except ImportError:
            from airflow.exceptions import AirflowException
            raise AirflowException(
                "apache-airflow-providers-amazon not installed, run: "
                "pip install 'apache-airflow-providers-postgres[amazon]'."
            )
        aws_conn_id = connection.extra_dejson.get("aws_conn_id", "aws_default")
        port = connection.port or 5439
        cluster_identifier = connection.extra_dejson.get("cluster-identifier", connection.host.split(".")[0])
        region_name = AwsBaseHook(aws_conn_id=aws_conn_id).region_name
        return f"{cluster_identifier}.{region_name}:{port}"
    def get_openlineage_database_dialect(self, connection) -> str:
        """Returns postgres/redshift dialect."""
        return "redshift" if connection.extra_dejson.get("redshift", False) else "postgres"
    def get_openlineage_default_schema(self) -> str | None:
        """Returns current schema. This is usually changed with ``SEARCH_PATH`` parameter."""
        return self.get_first("SELECT CURRENT_SCHEMA;")[0]