feat(nifi): SBOMs for NARs

[dervoeti]

Description

We currently include NARs in the NiFi image but not their SBOMs (except for the Iceberg NAR we build manually), even though they are generated. This change copies the generated SBOMs into the final image so we can see the full dependency tree for all components in NAR files.

I also changed the suffix of the Iceberg SBOM from .sbom.json to .cdx.json to match the suffix of the other SBOMs.

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>.