ruff

a1f3cda1 - Include global `--config` when determining namespace packages (#9603)

Include global `--config` when determining namespace packages (#9603) ## Summary When determining whether _any_ settings have namespace packages, we need to consider the global settings (as would be provided via `--config`). This was a subtle fallout of a refactor. Closes https://github.com/astral-sh/ruff/issues/9579. ## Test Plan Tested locally by compiling Ruff and running against this [namespace-test](https://github.com/gokay05/namespace-test) repo.