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/asyncio/locks.pyi

@@ -69,7 +69,7 @@ class Condition(_ContextManagerMixin):
     if sys.version_info >= (3, 11):
         def __init__(self, lock: Lock | None = None) -> None: ...
     else:
-        def __init__(self, lock: Lock | None = ..., *, loop: AbstractEventLoop | None = ...) -> None: ...
+        def __init__(self, lock: Lock | None = None, *, loop: AbstractEventLoop | None = ...) -> None: ...
 
     def locked(self) -> bool: ...
     async def acquire(self) -> Literal[True]: ...
@@ -85,7 +85,7 @@ class Semaphore(_ContextManagerMixin):
     if sys.version_info >= (3, 11):
         def __init__(self, value: int = 1) -> None: ...
     else:
-        def __init__(self, value: int = ..., *, loop: AbstractEventLoop | None = ...) -> None: ...
+        def __init__(self, value: int = 1, *, loop: AbstractEventLoop | None = ...) -> None: ...
 
     def locked(self) -> bool: ...
     async def acquire(self) -> Literal[True]: ...