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', 'SELECT * FROM test_table2'],
            dag=self.dag,
        )
        self.dag.clear()
        session.query(XCom).delete()
        ti = TaskInstance(
            task=bigquery_task,
            execution_date=DEFAULT_DATE,
        )
        job_id = ['123', '45']
        ti.xcom_push(key='job_id', value=job_id)
        self.assertEqual(
            {'BigQuery Console #1', 'BigQuery Console #2'}, bigquery_task.operator_extra_link_dict.keys()
        )
        self.assertEqual(
            'https://console.cloud.google.com/bigquery?j=123',
            bigquery_task.get_extra_links(DEFAULT_DATE, 'BigQuery Console #1'),
        )
        self.assertEqual(
            'https://console.cloud.google.com/bigquery?j=45',
            bigquery_task.get_extra_links(DEFAULT_DATE, 'BigQuery Console #2'),
        )
class TestBigQueryGetDataOperator(unittest.TestCase):