ruff

f3aaf84a - Move `refurb/helpers` utils to `ruff_python_semantic` for broader use (#6990)

Move `refurb/helpers` utils to `ruff_python_semantic` for broader use (#6990) ## Summary The utils added for `refurb` in its `helpers.rs` file could be useful for many other plugins. (Such as the PERF4XX codes, see e.g. https://github.com/astral-sh/ruff/pull/6132 ). This PR moves them to `ruff_python_semantic::analyzers::typing` as suggested in https://github.com/astral-sh/ruff/pull/6132#issuecomment-1697910093 ## Test Plan Confirmed `refurb` and all other tests still work