Update base classes used in bigquery_check_operator to renamed versions

[dewaldabrie]

airflow.contrib.operators.bigquery_check_operator.BigQueryValueCheckOperator is derived from airflow.operators.check_operator.ValueCheckOperator but needs to be derived from airflow.operators.sql.SQLValueCheckOperator instead.

Until this is done, airflow generates a lot of warnings from this line of code.

Fixes #10271

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst)
Here are some useful points:

• Pay attention to the quality of your code (flake8, pylint and type annotations). Our pre-commits will help you with that.
• In case of a new feature add useful documentation (in docstrings or in docs/ directory). Adding a new operator? Check this short guide Consider adding an example DAG that shows how users should use it.
• Consider using Breeze environment for testing locally, it’s a heavy docker but it ships with a working Airflow and a lot of integrations.
• Be patient and persistent. It might take some time to get a review or get the final approval from Committers.
• Please follow ASF Code of Conduct for all communication including (but not limited to) comments on Pull Requests, Mailing list and Slack.
• Be sure to read the Airflow Coding style.
  Apache Airflow is a community-driven project and together we are making it better 🚀.
  In case of doubts contact the developers at:
  Mailing List: [email protected]
  Slack: https://apache-airflow-slack.herokuapp.com/

[mik-laj]

@dewaldabrie Can you look here? #10271

[dewaldabrie]

@mik-laj Thanks, I replied there. Not sure why the checks in the CI is failing since it seems related to things I didn't touch like Add license for all SQL files.

[potiuk]

We have a bug in the CI cache specification. I am going to fix it shortly

[potiuk]

SHould be fixed now by #10299. I also cherry-picked it to 1-10-stable and 1-10-test. Can you please rebase again on top of the latest v1-10-stable and it should be fixed permanently now.

[potiuk]

Hey @dewaldabrie - if you want this one to be part of 1.10.12 (willl be released very shortly) you should rebase this one

[boring-cyborg]

Awesome work, congrats on your first merged pull request!