**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
destination_dataset_table: Optional[str] = None,
        write_disposition: str = 'WRITE_EMPTY',
        allow_large_results: Optional[bool] = False,
        flatten_results: Optional[bool] = None,
        gcp_conn_id: str = 'google_cloud_default',
        bigquery_conn_id: Optional[str] = None,
        delegate_to: Optional[str] = None,
        udf_config: Optional[list] = None,
        use_legacy_sql: bool = True,
        maximum_billing_tier: Optional[int] = None,
        maximum_bytes_billed: Optional[float] = None,
        create_disposition: str = 'CREATE_IF_NEEDED',
        schema_update_options: Optional[Union[list, tuple, set]] = None,
        query_params: Optional[list] = None,
        labels: Optional[dict] = None,
        priority: str = 'INTERACTIVE',
        time_partitioning: Optional[dict] = None,
        api_resource_configs: Optional[dict] = None,
        cluster_fields: Optional[List[str]] = None,
        location: Optional[str] = None,
        encryption_configuration: Optional[dict] = None,
        impersonation_chain: Optional[Union[str, Sequence[str]]] = None,
        **kwargs,
    ) -> None:
        super().__init__(**kwargs)
        if bigquery_conn_id:
            warnings.warn(
                "The bigquery_conn_id parameter has been deprecated. You should pass "
                "the gcp_conn_id parameter.",
                DeprecationWarning,