**Apache Airflow version**: 1.10.*
**BackPort Packages version**: 2020.10.5rc1

**What happened**:

`BigQueryInsertJobOperator` tries to start a BigQuery job by specifying a job_id which is a combination of `dag_id`, `task_id`, `execution_date` and an additional `uniqueness_suffix`.

https://github.com/apache/airflow/blob/master/airflow/providers/google/cloud/operators/bigquery.py#L2072

However, because BigQuery only accepts alphanumeric (in additon to dashes and underscore) characters then, if a DagID contains a version number whcih includes a `.` character then this will cause the task to fail.

https://cloud.google.com/bigquery/docs/running-jobs#generate-jobid

**How to reproduce it**:
Create a DAG with the name `my-dag-v1.0`.
airflow/providers/google/cloud/hooks/bigquery.py
:param max_results: The maximum number of results to return in a single response page.
            Leverage the page tokens to iterate through the entire collection.
        :type max_results: int
        :return: List of tables associated with the dataset
        """
        warnings.warn("This method is deprecated. Please use ``get_dataset_tables``.", DeprecationWarning)
        project_id = project_id or self.project_id
        tables = self.get_client().list_tables(
            dataset=DatasetReference(project=project_id, dataset_id=dataset_id),
            max_results=max_results,
        )
        if table_prefix:
            result = [t.reference.to_api_repr() for t in tables if t.table_id.startswith(table_prefix)]
        else:
            result = [t.reference.to_api_repr() for t in tables]
        self.log.info("%s tables found", len(result))
        return result
    @GoogleBaseHook.fallback_to_default_project_id
    def get_datasets_list(
        self,
        project_id: Optional[str] = None,
        include_all: bool = False,
        filter_: Optional[str] = None,
        max_results: Optional[int] = None,
        page_token: Optional[str] = None,
        retry: Retry = DEFAULT_RETRY,
    ) -> List[DatasetListItem]:
        """
        Method returns full list of BigQuery datasets in the current project
        For more information, see: