Add options to extend list of sensitive keywords

[Marloxo]

---

Make sure to mark the boxes below before creating PR: [x]

• Description above provides context of the change
• Unit tests coverage for changes (not needed for documentation changes)
• Target Github ISSUE in description if exists
• Commits follow "How to write a good git commit message"
• Relevant documentation is updated including usage instructions.
• I will engage committers as explained in Contribution Workflow Example.

this PR addressed the following issue: #9372

basically it's adding support for additional labels from the configuration so users can extend the matching of sensitive keywords in variables name.

[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.
• 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]

Can you add tests to avoid regression?

[Marloxo]

sure, I will take a look and update here

[mik-laj]

Deleted

[mik-laj]

@Marloxo Sorry. I wanted to publish it in another PR.

[Marloxo]

@mik-laj no worries, any advice what tests I shall add ?

[mik-laj]

You should use tests.test_utils.config.conf_vars decorator and check the configration option and return value. I would be happy if you would use parameterized to easily check many cases.

[Marloxo]

@mik-laj I updated the PR with tests, would you please take a look.

[mik-laj]

Can you also add docs to https://airflow.readthedocs.io/en/latest/security.html?

[boring-cyborg]

Awesome work, congrats on your first merged pull request!

[kaxil]

The tests were failing for this PR, it broke Master. Created a PR to fix it: #9446