**Apache Airflow version**: 2.0.1

**What happened**:

The operator fails at the last step, after successfully refreshing the workbook with this error:
```
tableauserverclient.server.endpoint.exceptions.ServerResponseError: 

        401002: Unauthorized Access
                Invalid authentication credentials were provided.
```

**What you expected to happen**:
It should not fail, like when we use the username/password authentication method (instead of personal_access_token)

<!-- What do you think went wrong? -->

Tableau server does not allow concurrent connections when using personal_access_token https://github.com/tableau/server-client-python/issues/717
The solution would be redesigning completely the operator to only call the hook once.
My quick fix was to edit this in TableauHook:

```
    def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any) -> None:
        pass
```

**How to reproduce it**:

Run this operator TableauRefreshWorkbookOperator using Tableau personal_access_token authentication (token_name, personal_access_token).

airflow/providers/tableau/sensors/tableau_job_status.py
#
#
from typing import Optional
from airflow.exceptions import AirflowException
from airflow.providers.tableau.hooks.tableau import TableauHook, TableauJobFinishCode
from airflow.sensors.base import BaseSensorOperator
class TableauJobFailedException(AirflowException):
    """An exception that indicates that a Job failed to complete."""
class TableauJobStatusSensor(BaseSensorOperator):
    """
    Watches the status of a Tableau Server Job.
    .. seealso:: https://tableau.github.io/server-client-python/docs/api-ref#jobs
    :param job_id: The job to watch.
    :type job_id: str
    :param site_id: The id of the site where the workbook belongs to.
    :type site_id: Optional[str]
    :param tableau_conn_id: The :ref:`Tableau Connection id <howto/connection:tableau>`
        containing the credentials to authenticate to the Tableau Server.
    :type tableau_conn_id: str
    """
    template_fields = ('job_id',)
    def __init__(