Improve return types of os.wait3 and os.wait4 (#11194)

Author: likewei92

stdlib/os/__init__.pyi

@@ -33,6 +33,9 @@ from . import path as _path
 if sys.version_info >= (3, 9):
     from types import GenericAlias
 
+if sys.platform != "win32":
+    from resource import struct_rusage
+
 # This unnecessary alias is to work around various errors
 path = _path
 
@@ -962,8 +965,8 @@ else:
 
         def waitid(__idtype: int, __ident: int, __options: int) -> waitid_result | None: ...
 
-    def wait3(options: int) -> tuple[int, int, Any]: ...
-    def wait4(pid: int, options: int) -> tuple[int, int, Any]: ...
+    def wait3(options: int) -> tuple[int, int, struct_rusage]: ...
+    def wait4(pid: int, options: int) -> tuple[int, int, struct_rusage]: ...
     def WCOREDUMP(__status: int) -> bool: ...
     def WIFCONTINUED(status: int) -> bool: ...
     def WIFSTOPPED(status: int) -> bool: ...