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/typing_extensions.pyi

@@ -224,9 +224,9 @@ else:
 
     def dataclass_transform(
         *,
-        eq_default: bool = ...,
-        order_default: bool = ...,
-        kw_only_default: bool = ...,
+        eq_default: bool = True,
+        order_default: bool = False,
+        kw_only_default: bool = False,
         field_specifiers: tuple[type[Any] | Callable[..., Any], ...] = ...,
         **kwargs: object,
     ) -> IdentityFunction: ...
@@ -268,11 +268,11 @@ class TypeVar:
         self,
         name: str,
         *constraints: Any,
-        bound: Any | None = ...,
-        covariant: bool = ...,
-        contravariant: bool = ...,
-        default: Any | None = ...,
-        infer_variance: bool = ...,
+        bound: Any | None = None,
+        covariant: bool = False,
+        contravariant: bool = False,
+        default: Any | None = None,
+        infer_variance: bool = False,
     ) -> None: ...
     if sys.version_info >= (3, 10):
         def __or__(self, right: Any) -> _SpecialForm: ...
@@ -294,7 +294,7 @@ class ParamSpec:
         bound: None | type[Any] | str = None,
         contravariant: bool = False,
         covariant: bool = False,
-        default: type[Any] | str | None = ...,
+        default: type[Any] | str | None = None,
     ) -> None: ...
     @property
     def args(self) -> ParamSpecArgs: ...
@@ -305,7 +305,7 @@ class ParamSpec:
 class TypeVarTuple:
     __name__: str
     __default__: Any | None
-    def __init__(self, name: str, *, default: Any | None = ...) -> None: ...
+    def __init__(self, name: str, *, default: Any | None = None) -> None: ...
     def __iter__(self) -> Any: ...  # Unpack[Self]
 
 def override(__arg: _F) -> _F: ...