**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/operators/bigquery.py
self,
        *,
        table: str,
        metrics_thresholds: dict,
        date_filter_column: str = 'ds',
        days_back: SupportsAbs[int] = -7,
        gcp_conn_id: str = 'google_cloud_default',
        bigquery_conn_id: Optional[str] = None,
        use_legacy_sql: bool = True,
        location: Optional[str] = None,
        impersonation_chain: Optional[Union[str, Sequence[str]]] = None,
        **kwargs,
    ) -> None:
        super().__init__(
            table=table,
            metrics_thresholds=metrics_thresholds,
            date_filter_column=date_filter_column,
            days_back=days_back,
            **kwargs,
        )
        if bigquery_conn_id:
            warnings.warn(_DEPRECATION_MSG, DeprecationWarning, stacklevel=3)
            gcp_conn_id = bigquery_conn_id
        self.gcp_conn_id = gcp_conn_id
        self.use_legacy_sql = use_legacy_sql
        self.location = location
        self.impersonation_chain = impersonation_chain
    def get_db_hook(self) -> BigQueryHook: