Combine poetry's utils and test groups

[gregtatum]

Now that we have more dependencies across files, imports are easily missing. For instance a missing zstandard import now breaks utils unless you also install the test groups. Rather than duplicate the imports between the two groups, I would propose that we combine them together and just have a single general installation group.

Potential negatives are conflicting import requirements and bigger installs in CI.

If we don't want to do this, then at least we should fix it and write a CI test that runs the --help of every util to ensure that it's working.