Consider built-in Python 3.13 __static_attributes__ class attribute

Context:

* https://docs.python.org/3.13/whatsnew/3.13.html#new-features
* https://docs.python.org/3.13/library/stdtypes.html#class.__static_attributes__
* python/cpython#115775
* python/cpython#115913

lib/sqlalchemy/util/langhelpers.py

@@ -1973,6 +1973,7 @@ def __init_subclass__(cls) -> None:
                     "__slots__",
                     "__orig_bases__",
                     "__annotations__",
+                    "__static_attributes__",
                 }
             )
             if remaining: