AnyStr cleanup (#5487)

* Replace all uses of StrPath, BytesPath, and AnyPath in Python 2 stubs.
* Add StrOrBytesPath as preferred alias for AnyPath.
* Replace all remaining AnyPath instances with StrOrBytesPath.
* Mark AnyPath as obsolete.

Part of #5470

stdlib/importlib/abc.pyi

@@ -1,6 +1,6 @@
 import sys
 import types
-from _typeshed import AnyPath
+from _typeshed import StrOrBytesPath
 from abc import ABCMeta, abstractmethod
 from importlib.machinery import ModuleSpec
 from typing import IO, Any, Iterator, Mapping, Optional, Protocol, Sequence, Tuple, Union
@@ -73,9 +73,9 @@ class FileLoader(ResourceLoader, ExecutionLoader, metaclass=ABCMeta):
 if sys.version_info >= (3, 7):
     class ResourceReader(metaclass=ABCMeta):
         @abstractmethod
-        def open_resource(self, resource: AnyPath) -> IO[bytes]: ...
+        def open_resource(self, resource: StrOrBytesPath) -> IO[bytes]: ...
         @abstractmethod
-        def resource_path(self, resource: AnyPath) -> str: ...
+        def resource_path(self, resource: StrOrBytesPath) -> str: ...
         @abstractmethod
         def is_resource(self, name: str) -> bool: ...
         @abstractmethod

stdlib/importlib/util.pyi

@@ -1,7 +1,7 @@
 import importlib.abc
 import importlib.machinery
 import types
-from _typeshed import AnyPath
+from _typeshed import StrOrBytesPath
 from typing import Any, Callable, List, Optional
 
 def module_for_loader(fxn: Callable[..., types.ModuleType]) -> Callable[..., types.ModuleType]: ...
@@ -20,7 +20,7 @@ def spec_from_loader(
 ) -> Optional[importlib.machinery.ModuleSpec]: ...
 def spec_from_file_location(
     name: str,
-    location: Optional[AnyPath] = ...,
+    location: Optional[StrOrBytesPath] = ...,
     *,
     loader: Optional[importlib.abc.Loader] = ...,
     submodule_search_locations: Optional[List[str]] = ...,