feat: OPA authorizer for Airflow 3

[razvan]

Description

• Adds a new OPA authorizer specifically for Airflow 3
• The Airflow 2 authorizer has been migrated from Poetry to uv
• The base image for the authorizer builder is the same as the final Airflow base image (stackable/image/vector)

Definition of Done Checklist

Note

Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant.

Please make sure all these things are done and tick the boxes

• Changes are OpenShift compatible
• All added packages (via microdnf or otherwise) have a comment on why they are added
• Things not downloaded from Red Hat repositories should be mirrored in the Stackable repository and downloaded from there
• All packages should have (if available) signatures/hashes verified
• Add an entry to the CHANGELOG.md file
• Integration tests ran successfully

TIP: Running integration tests with a new product image

The image can be built and uploaded to the kind cluster with the following commands:

bake --product <product> --image-version <stackable-image-version>
kind load docker-image <image-tagged-with-the-major-version> --name=<name-of-your-test-cluster>

See the output of bake to retrieve the image tag for <image-tagged-with-the-major-version>.

[adwk67]

LGTM. Just need a changelog entry and a note about ~/airflow for the uv tests.

[razvan]

LGTM. Just need a changelog entry and a note about ~/airflow for the uv tests.

Thank you. b0beb73