### Apache Airflow version

2.6.1

### What happened

When i use _do_xcom_push=True_ in **DatabricksSqlOperator** the an exception with following stack trace is thrown:

```
[2023-06-06, 08:52:24 UTC] {sql.py:375} INFO - Running statement: SELECT cast(max(id) as STRING) FROM prod.unified.sessions, parameters: None
[2023-06-06, 08:52:25 UTC] {taskinstance.py:1824} ERROR - Task failed with exception
Traceback (most recent call last):
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/utils/session.py", line 73, in wrapper
    return func(*args, **kwargs)
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/models/taskinstance.py", line 2354, in xcom_push
    XCom.set(
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/utils/session.py", line 73, in wrapper
    return func(*args, **kwargs)
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/models/xcom.py", line 237, in set
    value = cls.serialize_value(
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/models/xcom.py", line 632, in serialize_value
    return json.dumps(value, cls=XComEncoder).encode("UTF-8")
  File "/usr/local/lib/python3.10/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/utils/json.py", line 102, in encode
    o = self.default(o)
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/utils/json.py", line 91, in default
    return serialize(o)
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/serialization/serde.py", line 144, in serialize
    return encode(classname, version, serialize(data, depth + 1))
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/serialization/serde.py", line 123, in serialize
    return [serialize(d, depth + 1) for d in o]
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/serialization/serde.py", line 123, in <listcomp>
    return [serialize(d, depth + 1) for d in o]
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/serialization/serde.py", line 132, in serialize
    qn = qualname(o)
  File "/home/airflow/.local/lib/python3.10/site-packages/airflow/utils/module_loading.py", line 47, in qualname
    return f"{o.__module__}.{o.__name__}"
  File "/home/airflow/.local/lib/python3.10/site-packages/databricks/sql/types.py", line 161, in __getattr__
    raise AttributeError(item)
AttributeError: __name__. Did you mean: '__ne__'?
```

### What you think should happen instead


In _process_output() if self._output_path is False a list of tuples is returned:
```
 def _process_output(self, results: list[Any], descriptions: list[Sequence[Sequence] | None]) -> list[Any]:
    if not self._output_path:
        return list(zip(descriptions, results))
```

I suspect this breaks the serialization somehow which might be related to my own meta database(postgres).

Replacing the Databricks SQL Operator with simple **PythonOperator** and **DatabricksSqlHook** works just fine:

```
def get_max_id(ti):
    hook = DatabricksSqlHook(databricks_conn_id=databricks_sql_conn_id, sql_endpoint_name='sql_endpoint')
    sql = "SELECT cast(max(id) as STRING) FROM prod.unified.sessions"
    return str(hook.get_first(sql)[0])
```

### How to reproduce

```
    get_max_id_task = DatabricksSqlOperator(
        databricks_conn_id=databricks_sql_conn_id,
        sql_endpoint_name='sql_endpoint',
        task_id='get_max_id',
        sql="SELECT cast(max(id) as STRING) FROM prod.unified.sessions",
        do_xcom_push=True
    )
```

### Operating System

Debian GNU/Linux 11 (bullseye) docker image, python 3.10

### Versions of Apache Airflow Providers

apache-airflow-providers-common-sql==1.5.1
databricks-sql-connector==2.5.2
apache-airflow-providers-databricks==4.2.0

### Deployment

Docker-Compose

### Deployment details

Using extended Airflow image, LocalExecutor, Postgres 13 meta db as container in the same stack.
docker-compose version 1.29.2, build 5becea4c
Docker version 23.0.5, build bc4487a

### 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)

"""
    Test the execute function in case where SQL query was successful.
    """
    with patch("airflow.providers.databricks.operators.databricks_sql.DatabricksSqlHook") as db_mock_class:
        op = DatabricksSqlOperator(
            task_id=TASK_ID,
            sql=sql,
            do_xcom_push=True,
            return_last=return_last,
            split_statements=split_statement,
        )
        db_mock = db_mock_class.return_value
        db_mock.run.return_value = hook_results
        db_mock.descriptions = hook_descriptions
        execute_results = op.execute(None)
        assert execute_results == expected_results
        db_mock_class.assert_called_once_with(
            DEFAULT_CONN_ID,
            http_path=None,
            session_configuration=None,
            sql_endpoint_name=None,
            http_headers=None,
            catalog=None,
            schema=None,
            caller="DatabricksSqlOperator",
        )