Enable nearly all pyupgrade rules (except on test cases) (#11499)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

stubs/six/six/moves/builtins.pyi

@@ -1 +1,4 @@
-from builtins import *
+# flake8: noqa: NQA102 # https://github.com/plinss/flake8-noqa/issues/22
+# six explicitly re-exports builtins. Normally this is something we'd want to avoid.
+# But this is specifically a compatibility package.
+from builtins import *  # noqa: UP029