pkg_resources: Remove stray Anys and use more Self & NoReturn types

stubs/setuptools/pkg_resources/__init__.pyi

@@ -1,7 +1,7 @@
 import types
 import zipimport
 from _typeshed import Incomplete
-from collections.abc import Callable, Generator, Iterable, Iterator, Mapping, Sequence
+from collections.abc import Callable, Generator, Iterable, Iterator, Sequence
 from io import BytesIO
 from pkgutil import get_importer as get_importer
 from re import Pattern
@@ -265,7 +265,7 @@ class IMetadataProvider(Protocol):
     def metadata_listdir(self, name: str) -> list[str]: ...
     def get_metadata(self, name: str) -> str: ...
     def get_metadata_lines(self, name: str) -> Generator[str, None, None]: ...
-    def run_script(self, script_name: str, namespace: Mapping[str, object]) -> None: ...
+    def run_script(self, script_name: str, namespace: dict[str, Any]) -> None: ...
 
 class ResolutionError(Exception): ...
 
@@ -333,7 +333,7 @@ class NullProvider:
     def metadata_isdir(self, name: str) -> bool: ...
     def resource_listdir(self, resource_name) -> list[str]: ...
     def metadata_listdir(self, name: str) -> list[str]: ...
-    def run_script(self, script_name: str, namespace: Mapping[str, object]) -> None: ...
+    def run_script(self, script_name: str, namespace: dict[str, Any]) -> None: ...
 
 # Doesn't actually extend NullProvider, solves a typing issue in pytype_test.py
 class Distribution(NullProvider):