Expand CODEOWNER auth pattern

What does this MR do and why?

Add a new script tooling/bin/find_codeowners which can generate the auth section for CODEOWNER

How to set up and validate locally

• Run tooling/bin/find_codeowners tooling/config/CODEOWNERS.yml and paste the contents to CODEOWNER for the section [Authentication and Authorization] and see if there's any changes.

What's still missing

• Documentation
• A new CI job to make sure the list is up-to-date?
  • Does this mean we should also convert other CODEOWNERS to be generated?

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

See #360399 (closed)