Enable Docker build checks

[lfrancke]

Description

Enable Docker build checks
https://docs.docker.com/build/checks/
A Docker build will now fail if there is a violation against one of the built-in Docker validation rules

I did manually build all images and fixed all validation warnings that popped up. Most were not bad but two were an actual bug (spark & kafka-testing-tools, both not bad)

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] Add an entry to the CHANGELOG.md file

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>.

[NickLarsenNZ]

Needs a changelog entry.

I also asked elsewhere but can't recall where.. what should we do about the hadolint failures around apt package versioning?
Non-admins won't be able to merge if the errors aren't resolved (I don't think).

We can either add a rule to ignore those checks (so it works as it always has), or pin the versions - which is a bit of work and will constantly need changing.

[lfrancke]

Changelog has been added

as to your other question: the pre-commit checks are optional for now, I'd be happy to add a rule ignoring those packaging things for now until we get to it

[NickLarsenNZ]

LGTM