### Apache Airflow version

2.2.2 (latest released)

### What happened

It logs into the Tableau server, starts a refresh, and then throws a NotSignedInError exception:

```
[2021-12-20, 07:40:13 CST] {{base.py:70}} INFO - Using connection to: id: tableau. Host: https://xxx/, Port: None, Schema: , Login: xxx, Password: ***, extra: {}
[2021-12-20, 07:40:14 CST] {{auth_endpoint.py:37}} INFO - Signed into https://xxx/ as user with id xxx-xxx-xxx-xxx-xxx
[2021-12-20, 07:40:14 CST] {{workbooks_endpoint.py:41}} INFO - Querying all workbooks on site
[2021-12-20, 07:40:14 CST] {{tableau.py:141}} INFO - Found matching with id xxx-xxx-xxx-xxx-xxx
[2021-12-20, 07:40:14 CST] {{auth_endpoint.py:53}} INFO - Signed out
[2021-12-20, 07:40:14 CST] {{jobs_endpoint.py:41}} INFO - Query for information about job xxx-xxx-xxx-xxx-xxx
[2021-12-20, 07:40:14 CST] {{taskinstance.py:1703}} ERROR - Task failed with exception
Traceback (most recent call last):
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/models/taskinstance.py", line 1332, in _run_raw_task
    self._execute_task_with_callbacks(context)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/models/taskinstance.py", line 1458, in _execute_task_with_callbacks
    result = self._execute_task(context, self.task)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/models/taskinstance.py", line 1509, in _execute_task
    result = execute_callable(context=context)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/providers/tableau/operators/tableau.py", line 124, in execute
    if not tableau_hook.wait_for_state(
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/providers/tableau/hooks/tableau.py", line 180, in wait_for_state
    finish_code = self.get_job_status(job_id=job_id)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/providers/tableau/hooks/tableau.py", line 163, in get_job_status
    return TableauJobFinishCode(int(self.server.jobs.get_by_id(job_id).finish_code))
  File "/home/airflow/.local/lib/python3.9/site-packages/tableauserverclient/server/endpoint/endpoint.py", line 177, in wrapper
    return func(self, *args, **kwargs)
  File "/home/airflow/.local/lib/python3.9/site-packages/tableauserverclient/server/endpoint/jobs_endpoint.py", line 42, in get_by_id
    url = "{0}/{1}".format(self.baseurl, job_id)
  File "/home/airflow/.local/lib/python3.9/site-packages/tableauserverclient/server/endpoint/jobs_endpoint.py", line 14, in baseurl
    return "{0}/sites/{1}/jobs".format(self.parent_srv.baseurl, self.parent_srv.site_id)
  File "/home/airflow/.local/lib/python3.9/site-packages/tableauserverclient/server/server.py", line 168, in site_id
    raise NotSignedInError(error)
tableauserverclient.server.exceptions.NotSignedInError: Missing site ID. You must sign in first.
[2021-12-20, 07:40:14 CST] {{taskinstance.py:1270}} INFO - Marking task as FAILED. dag_id=tableau-refresh, task_id=refresh_tableau_workbook, execution_date=20211220T194008, start_date=20211220T194013, end_date=20211220T194014
```

### What you expected to happen

It should've logged into Tableau, started a refresh, and then waited for the refresh to finish.

### How to reproduce

Use a TableauOperator with a blocking refresh:

```
TableauOperator(
    resource='workbooks',
    method='refresh',
    find='Tableau workbook',
    match_with='name',
    site_id='tableau_site',
    task_id='refresh_tableau_workbook',
    tableau_conn_id='tableau',
    blocking_refresh=True,
    dag=dag,
)
```

### Operating System

Debian GNU/Linux 10 (buster)

### Versions of Apache Airflow Providers

apache-airflow-providers-tableau==2.1.2

### Deployment

Docker-Compose

### Deployment details

I'm using the official `apache/airflow:2.2.2-python3.9` Docker image

### Anything else

It occurs every time I use the new TableauOperator to do a blocking refresh of a workbook.

### 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)

tests/providers/tableau/operators/test_tableau.py
"""
    Test class for TableauOperator
    """
    def setUp(self):
        """
        setup
        """
        self.mocked_workbooks = []
        self.mock_datasources = []
        for i in range(3):
            mock_workbook = Mock()
            mock_workbook.id = i
            mock_workbook.name = f'wb_{i}'
            self.mocked_workbooks.append(mock_workbook)
            mock_datasource = Mock()
            mock_datasource.id = i
            mock_datasource.name = f'ds_{i}'
            self.mock_datasources.append(mock_datasource)
        self.kwargs = {
            'site_id': 'test_site',
            'task_id': 'task',
            'dag': None,
            'match_with': 'name',
            'method': 'refresh',
        }
    @patch('airflow.providers.tableau.operators.tableau.TableauHook')
    def test_execute_workbooks(self, mock_tableau_hook):