Extract image-tools to it's own repository.

[razvan]

Description

Moved the image_tools module to it's own repository: https://github.com/stackabletech/image-tools

The image_tools/conf.py has been moved to the root of the repository and remains unchanged.

Definition of Done Checklist

• 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

- [x] Changes are OpenShift compatible
- [x] All added packages (via microdnf or otherwise) have a comment on why they are added
- [x] Things not downloaded from Red Hat repositories should be mirrored in the Stackable repository and downloaded from there
- [x] All packages should have (if available) signatures/hashes verified
- [x] Does your change affect an SBOM? Make sure to update all SBOMs

[nightkr]

Is there a discussion or rationale for this somewhere?

[razvan]

I guess, the rationale is that it's good to decouple tools from configuration. We can apply best practices to the Python code without polluting this repo with python specific project workflows.

[siegfriedweber]

LGTM