**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
"""
        Fetch all (remaining) rows of a query result, returning them as a sequence of
        sequences (e.g. a list of tuples).
        """
        result = []
        while True:
            one = self.fetchone()
            if one is None:
                break
            result.append(one)
        return result
    def get_arraysize(self) -> int:
        """Specifies the number of rows to fetch at a time with .fetchmany()"""
        return self.buffersize or 1
    def set_arraysize(self, arraysize: int) -> None: