test that `scripts/eachdist.py` version bump makes sense

At release time we run `scripts/eachdist.py` to bump the package versions. Packages released independently should be excluded from this bump since they are doing their own versioning. For 1.40.0 two genai instrumentation were missing from the `exclude_release` group in `eachdist.ini` and so their version was wrongly bumped in the prerelease workflow. I'm not sure what consequences not catching this would have had, maybe a failure in the release step or maybe an upload of package with the wrong version. To avoid this in the future we may add a test in CI that checks the the eventual bump make sense, a simple check can be that the new version is bigger than the current one and that is current+1. We need also a label to skip the check if that's what we really want to do.