Add job that verifies all image tags are the correct ubuntu codename

[djbender]

Right now, because core image changes are immediately reflected in all downstream images there's no way to prevent a situation where a tag like -jammy is actually a lunar core image. I think we can repurpose a rake task to generate every tag and then use that to created a build where each image is checked against a known list of core images to ensure a downstream image isn't accidentally upgraded and labelled incorrectly.

Maybe we can repurpose the manifest to be exhaustive check against all tags ever pushed to ECR? That might be paranoid, but it would give a safety net for long term maintenance.

The reason for this issue is that I'm currently unravelling this exact situation manually.