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
airflow/providers/google/cloud/operators/bigquery.py
"""Hex colors for BigQuery operators"""
    CHECK = "#C0D7FF"
    QUERY = "#A1BBFF"
    TABLE = "#81A0FF"
    DATASET = "#5F86FF"
class BigQueryConsoleLink(BaseOperatorLink):
    """Helper class for constructing BigQuery link."""
    name = 'BigQuery Console'
    def get_link(self, operator, dttm):
        ti = TaskInstance(task=operator, execution_date=dttm)
        job_id = ti.xcom_pull(task_ids=operator.task_id, key='job_id')
        return BIGQUERY_JOB_DETAILS_LINK_FMT.format(job_id=job_id) if job_id else ''
@attr.s(auto_attribs=True)
class BigQueryConsoleIndexableLink(BaseOperatorLink):
    """Helper class for constructing BigQuery link."""
    index: int = attr.ib()
    @property
    def name(self) -> str:
        return f'BigQuery Console #{self.index + 1}'
    def get_link(self, operator: BaseOperator, dttm: datetime):
        ti = TaskInstance(task=operator, execution_date=dttm)
        job_ids = ti.xcom_pull(task_ids=operator.task_id, key='job_id')
        if not job_ids:
            return None
        if len(job_ids) < self.index:
            return None
        job_id = job_ids[self.index]
        return BIGQUERY_JOB_DETAILS_LINK_FMT.format(job_id=job_id)
class BigQueryCheckOperator(CheckOperator):