**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/hooks/bigquery.py
#
#
#
#
"""
This module contains a BigQuery Hook, as well as a very basic PEP 249
implementation for BigQuery.
"""
import logging
import time
import warnings
from copy import deepcopy
from typing import Any, Dict, Iterable, List, Mapping, NoReturn, Optional, Sequence, Tuple, Type, Union
from google.api_core.retry import Retry
from google.cloud.bigquery import (
    DEFAULT_RETRY,
    Client,
    CopyJob,