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
with self.dag:
            BigQueryExecuteQueryOperator(
                task_id=TASK_ID,
                sql='SELECT * FROM test_table',
            )
        serialized_dag = SerializedDAG.to_dict(self.dag)
        self.assertIn("sql", serialized_dag["dag"]["tasks"][0])
        dag = SerializedDAG.from_dict(serialized_dag)
        simple_task = dag.task_dict[TASK_ID]
        self.assertEqual(getattr(simple_task, "sql"), 'SELECT * FROM test_table')
        
        
        
        
        self.assertEqual(
            serialized_dag["dag"]["tasks"][0]["_operator_extra_links"],
            [{'airflow.providers.google.cloud.operators.bigquery.BigQueryConsoleLink': {}}],
        )
        
        self.assertIsInstance(list(simple_task.operator_extra_links)[0], BigQueryConsoleLink)
        ti = TaskInstance(task=simple_task, execution_date=DEFAULT_DATE)
        ti.xcom_push('job_id', 12345)
        
        url = simple_task.get_extra_links(DEFAULT_DATE, BigQueryConsoleLink.name)
        self.assertEqual(url, 'https://console.cloud.google.com/bigquery?j=12345')
        
        url2 = simple_task.get_extra_links(datetime(2017, 1, 2), BigQueryConsoleLink.name)
        self.assertEqual(url2, '')
    def test_bigquery_operator_extra_serialized_field_when_multiple_queries(self):