### Apache Airflow Provider(s)

google

### Versions of Apache Airflow Providers

apache-airflow-providers-google==7.0.0

But the problem exists in all newer versions.

### Apache Airflow version

apache-airflow==2.3.2

### Operating System

Ubuntu 20.04.4 LTS

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

_No response_

### What happened

The `list_rows` method in the BigQuery Hook does not return the page_token value, which is necessary for paginating query results. Same problem with `get_datasets_list` method. 

The documentation for the `get_datasets_list` method even states that the page_token parameter can be accessed:
```
            :param page_token:  Token representing a cursor into the datasets. If not passed,
            the API will return the first page of datasets. The token marks the beginning of the
            iterator to be returned and the value of the ``page_token`` can be accessed at
            ``next_page_token`` of the :class:`~google.api_core.page_iterator.HTTPIterator`.
```
but it doesn't return HTTPIterator. Instead, it converts the `HTTPIterator` to `list[DatasetListItem]` using `list(datasets)`, making it impossible to retrieve the original `HTTPIterator` and thus impossible to obtain the `next_page_token`.

### What you think should happen instead

`list_rows` \ `get_datasets_list` methods should return `Iterator` OR both the list of rows\datasets and the page_token value to allow users to retrieve multiple results pages. For backward compatibility, we can have a parameter like `return_iterator=True` or smth like that. 

### How to reproduce

_No response_

### Anything else

_No response_

### 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)

mock_get_query_results = mock_get_service.return_value.jobs.return_value.getQueryResults
        mock_execute = mock_get_query_results.return_value.execute
        mock_execute.return_value = {}
        bq_cursor = self.hook.get_cursor()
        bq_cursor.job_id = JOB_ID
        result = bq_cursor.next()
        assert result is None
        mock_get_query_results.assert_called_once_with(
            jobId=JOB_ID, location=None, pageToken=None, projectId="bq-project"
        )
        mock_execute.assert_called_once_with(num_retries=bq_cursor.num_retries)
        assert mock_flush_results.call_count == 1
    @mock.patch("airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_service")
    @mock.patch("airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.insert_job")
    @mock.patch("airflow.providers.google.cloud.hooks.bigquery.BigQueryCursor.flush_results")
    def test_flush_cursor_in_execute(self, _, mock_insert, mock_get_service):