Use Incomplete instead of Any in __getattr__ (#8903)

stubs/boto/boto/__init__.pyi

@@ -1,4 +1,5 @@
 import logging
+from _typeshed import Incomplete
 from typing import Any
 
 from .s3.connection import S3Connection
@@ -102,4 +103,4 @@ def storage_uri(
 def storage_uri_for_key(key): ...
 
 # Explicitly mark this package as incomplete.
-def __getattr__(name: str) -> Any: ...
+def __getattr__(name: str) -> Incomplete: ...

stubs/boto/boto/ec2/__init__.pyi

@@ -1,3 +1,4 @@
+from _typeshed import Incomplete
 from typing import Any
 
 RegionData: Any
@@ -7,4 +8,4 @@ def connect_to_region(region_name, **kw_params): ...
 def get_region(region_name, **kw_params): ...
 
 # Explicitly mark this package as incomplete.
-def __getattr__(name: str) -> Any: ...
+def __getattr__(name: str) -> Incomplete: ...