In the [discussion of the recent bad mesa update](https://discussion.fedoraproject.org/t/is-most-recent-mesa-push-to-stable-mesa-25-2-7-2-fc43-reasonable/173585) it was noted that running `vkcube --validate` showed the problem. However, it's not clear whether running it inside a non-accelerated VM is a useful test or not.

We should test (using the known-broken mesa) whether the check is useful in openQA context, and if it turns out it would've caught the bug, we should add a test for it.

@airlied let us know if you have any notes here - is running this check on llvmpipe in a qemu VM likely to be useful? Are there any other handy 'smoke test' commands we could run as well / instead?