gh-95105: Return Iterator from wsgiref.types.InputStream.__iter__ (GH-95106)

(cherry picked from commit b4378948)

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

Lib/wsgiref/types.py

 """WSGI-related types for static type checking"""
 
-from collections.abc import Callable, Iterable
+from collections.abc import Callable, Iterable, Iterator
 from types import TracebackType
 from typing import Any, Protocol, TypeAlias
 
@@ -35,7 +35,7 @@ class InputStream(Protocol):
     def read(self, size: int = ..., /) -> bytes: ...
     def readline(self, size: int = ..., /) -> bytes: ...
     def readlines(self, hint: int = ..., /) -> list[bytes]: ...
-    def __iter__(self) -> Iterable[bytes]: ...
+    def __iter__(self) -> Iterator[bytes]: ...
 
 class ErrorStream(Protocol):
     """WSGI error stream as defined in PEP 3333"""

Misc/NEWS.d/next/Library/2022-07-21-19-55-49.gh-issue-95105.BIX2Km.rst

+:meth:`wsgiref.types.InputStream.__iter__` should return ``Iterator[bytes]``, not ``Iterable[bytes]``. Patch by Shantanu Jain.