Apache Airflow version: 1.10.*
BackPort Packages version: 2020.10.29rc1

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/PolideaInternal/airflow/blob/e5307990adb49a5a1c1c88a029940682efee0f9e/airflow/providers/google/cloud/operators/bigquery.py#L2073

However, it would appear that the regex pattern that is attempting to remove the `+` character is not correct as this still remain in `job_id` after `re.sub` is applied.

https://github.com/PolideaInternal/airflow/blob/e5307990adb49a5a1c1c88a029940682efee0f9e/airflow/providers/google/cloud/operators/bigquery.py#L2073

`Invalid job ID "airflow_my_test_dag_v1_test_2020_10_01T00_00_00+00_00_27f69de5cd17a012f3c89d414a70fe64". Job IDs must be alphanumeric (plus underscores and dashes) and must be at most 1024 characters long.
`  

How to reproduce it:

- Create a DAG with the name my-test-dag-v1.
- Run any query against BigQuery using this operator
tests/providers/google/cloud/operators/test_bigquery.py
bigquery_task = BigQueryExecuteQueryOperator(
            task_id=TASK_ID,
            sql='SELECT * FROM test_table',
            dag=self.dag,
        )
        self.dag.clear()
        session.query(XCom).delete()
        ti = TaskInstance(
            task=bigquery_task,
            execution_date=DEFAULT_DATE,
        )
        job_id = '12345'
        ti.xcom_push(key='job_id', value=job_id)
        self.assertEqual(
            'https://console.cloud.google.com/bigquery?j={job_id}'.format(job_id=job_id),
            bigquery_task.get_extra_links(DEFAULT_DATE, BigQueryConsoleLink.name),
        )
        self.assertEqual(
            '',
            bigquery_task.get_extra_links(datetime(2019, 1, 1), BigQueryConsoleLink.name),
        )
    @provide_session
    @mock.patch('airflow.providers.google.cloud.operators.bigquery.BigQueryHook')
    def test_bigquery_operator_extra_link_when_multiple_query(self, mock_hook, session):