Update importlib.resources types (#8658)

* Replace `Str[OrBytes]Path` with `str`

A filesystem path is not valid as an abstract resource.

`TraversableResources` cannot only accept strings if `ResourceReader`
accepts both bytes and strings.  `importlib.resources` does not work
with bytes in any case and `ResourceReader` is typed as taking
a `typing.Text` object in `importlib.resources`' source code.

* Update `joinpath` signature from Python 3.11

stdlib/importlib/abc.pyi

@@ -1,14 +1,6 @@
 import sys
 import types
-from _typeshed import (
-    OpenBinaryMode,
-    OpenBinaryModeReading,
-    OpenBinaryModeUpdating,
-    OpenBinaryModeWriting,
-    OpenTextMode,
-    StrOrBytesPath,
-    StrPath,
-)
+from _typeshed import OpenBinaryMode, OpenBinaryModeReading, OpenBinaryModeUpdating, OpenBinaryModeWriting, OpenTextMode
 from abc import ABCMeta, abstractmethod
 from collections.abc import Iterator, Mapping, Sequence
 from importlib.machinery import ModuleSpec
@@ -93,9 +85,9 @@ class FileLoader(ResourceLoader, ExecutionLoader, metaclass=ABCMeta):
 
 class ResourceReader(metaclass=ABCMeta):
     @abstractmethod
-    def open_resource(self, resource: StrOrBytesPath) -> IO[bytes]: ...
+    def open_resource(self, resource: str) -> IO[bytes]: ...
     @abstractmethod
-    def resource_path(self, resource: StrOrBytesPath) -> str: ...
+    def resource_path(self, resource: str) -> str: ...
     if sys.version_info >= (3, 10):
         @abstractmethod
         def is_resource(self, path: str) -> bool: ...
@@ -115,8 +107,12 @@ if sys.version_info >= (3, 9):
         def is_file(self) -> bool: ...
         @abstractmethod
         def iterdir(self) -> Iterator[Traversable]: ...
-        @abstractmethod
-        def joinpath(self, child: StrPath) -> Traversable: ...
+        if sys.version_info >= (3, 11):
+            @abstractmethod
+            def joinpath(self, *descendants: str) -> Traversable: ...
+        else:
+            @abstractmethod
+            def joinpath(self, child: str) -> Traversable: ...
         # The .open method comes from pathlib.pyi and should be kept in sync.
         @overload
         @abstractmethod
@@ -180,7 +176,7 @@ if sys.version_info >= (3, 9):
         @property
         def name(self) -> str: ...
         @abstractmethod
-        def __truediv__(self, child: StrPath) -> Traversable: ...
+        def __truediv__(self, child: str) -> Traversable: ...
         @abstractmethod
         def read_bytes(self) -> bytes: ...
         @abstractmethod
@@ -189,7 +185,7 @@ if sys.version_info >= (3, 9):
     class TraversableResources(ResourceReader):
         @abstractmethod
         def files(self) -> Traversable: ...
-        def open_resource(self, resource: StrPath) -> BufferedReader: ...  # type: ignore[override]
+        def open_resource(self, resource: str) -> BufferedReader: ...  # type: ignore[override]
         def resource_path(self, resource: Any) -> NoReturn: ...
-        def is_resource(self, path: StrPath) -> bool: ...
+        def is_resource(self, path: str) -> bool: ...
         def contents(self) -> Iterator[str]: ...