This reverts commitb6bab59343. Revert "Bug 1967634 - Add `python-sites` lint to facilitate adding rules specific to `python/sites/` r=ahal" This reverts commitcd14d13cec. Revert "Bug 1965905 - Remove `vendor_requirements.txt/in` as they are no longer necessary with `uv` python vendoring r=ahal" This reverts commitdbb9b5ca9b. Revert "Bug 1965907 - Re-enable `test_vendor.py` r=ahal" This reverts commitc39a35d0a2.