Upgrade pyright, improve pyright config files (#8072)

stubs/SQLAlchemy/sqlalchemy/orm/unitofwork.pyi

@@ -49,7 +49,10 @@ class Preprocess(IterateMappersMixin):
 
 class PostSortRec:
     disabled: Any
-    def __new__(cls, uow, *args): ...
+    # At runtime __new__ is defined, not __init__,
+    # But if we define __new__ here then all subclasses are identified by pyright
+    # as having __init__ methods that are inconsistent with their __new__ methods
+    def __init__(self, uow, *args) -> None: ...
     def execute_aggregate(self, uow, recs) -> None: ...
 
 class ProcessAll(IterateMappersMixin, PostSortRec):

stubs/SQLAlchemy/sqlalchemy/sql/annotation.pyi

@@ -7,7 +7,6 @@ class SupportsCloneAnnotations(SupportsAnnotations): ...
 class SupportsWrappingAnnotations(SupportsAnnotations): ...
 
 class Annotated:
-    def __new__(cls, *args): ...
     __dict__: Any
     def __init__(self, element, values) -> None: ...
     def __reduce__(self): ...