Red Hat Container Certification

Update the CI pipeline and Starter Kits to build images with the features they need to pass Red Hat Container Certification.

From issue #683:

When a pipeline builds a container image and adds it to the container registry, that image should meet the [Qualities of Universal Images](https://github.ibm.com/TT-ISV-org/images/blob/main/article/outline.md), at least the qualities that are required for Red Hat Container Certification (which is most of them).

Toolkit pipelines already build images that meet most of these requirements. Some additional ones:
- [x] Image identification
- [x] Update image security content
- [x] Image license
- [ ] Fewer than 40 image layers

As a result, any image built by the Toolkit should be highly likely to pass certification. For users who don't want to get their images certified, they still have a very high-quality image.