Add more defaults to the stdlib (#9606)

Continuing work towards #8988.

The first five commits were created using stubdefaulter on various Python versions; the following commits were all created manually by me to fix various problems. The main things this adds that weren't present in #9501 are:

- Defaults in Windows-only modules and Windows-only branches (because I'm running a Windows machine)
- Defaults in non-py311 branches
- Defaults for float parameters
- Defaults for overloads

stdlib/multiprocessing/managers.pyi

@@ -137,11 +137,15 @@ class BaseManager:
             serializer: str = "pickle",
             ctx: BaseContext | None = None,
             *,
-            shutdown_timeout: float = ...,
+            shutdown_timeout: float = 1.0,
         ) -> None: ...
     else:
         def __init__(
-            self, address: Any | None = ..., authkey: bytes | None = ..., serializer: str = ..., ctx: BaseContext | None = ...
+            self,
+            address: Any | None = None,
+            authkey: bytes | None = None,
+            serializer: str = "pickle",
+            ctx: BaseContext | None = None,
         ) -> None: ...
 
     def get_server(self) -> Server: ...