For developers, who have cloned ethereum/execution-specs, generated code should be formatted by ruff using the settings from pyproject.toml. Then's it ready to check-in and passes checks.

However, for package users, to avoid adding ruff as a dependency package, it seems fine to simply skip this step, especially since this means we can skip adding ruff as a package dependency.

As part of this work, we should remove the addition of the lint dependency group from tests_pytest_pypy3 tox env: