Figure out why the release artifact won't work for anvil in CI, but works in the release script and localy

[cgruber]

For some reason, a ClassNotFoundException occurs on CI when you enable extracting the rules from the release artifact. Looking at the release artifact, it's all in place, the jars are there, they contain the right thing, and it works when you set up a project separately. It also works in the release script with the --override_repository flag. It seems to only fail in CI. Need to figure out why so we can re-enable CI to use the release artifact, instead of the developer-mode of the rules repository.