Refactor: BigQuery to GCS Operator

[shuhoy]

(Take over from #22252 and created new PR.)

Point to change

For simplicity and due to issue #22034 , change to use function run_extract in BigQueryHook to transfer execution.

Related issue

closes #22034

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[shuhoy]

All commits and checks are done.

[boring-cyborg]

Awesome work, congrats on your first merged pull request!

[jedcunningham]

@shuhoy, congrats on your first commit! In fact, you are the 2000th contributor to Airflow 🎉🚀!

[potiuk]

CONGRATS!

[shuhoy]

Oh! That's exciting!!
I'm grad to contribute to Airflow community!

[kaxil]

Congratulations 🎉 -- well done :)

[gmyrianthous]

Any chance this is related to this issue?

[shuhoy]

Hi @gmyrianthous !
I think this PR is not related to your issue.
But I guess this change is related.
The following line in the error message you faced seems to have been added by this change.

  File "/opt/python3.8/lib/python3.8/site-packages/airflow/providers/google/cloud/transfers/bigquery_to_gcs.py", line 141, in execute
    job = hook.get_job(job_id=job_id).to_api_repr()