Update typing-extensions; some 3.12 updates (#10200)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

stdlib/typing.pyi

@@ -136,14 +136,32 @@ Any = object()
 
 @_final
 class TypeVar:
-    __name__: str
-    __bound__: Any | None
-    __constraints__: tuple[Any, ...]
-    __covariant__: bool
-    __contravariant__: bool
-    def __init__(
-        self, name: str, *constraints: Any, bound: Any | None = None, covariant: bool = False, contravariant: bool = False
-    ) -> None: ...
+    @property
+    def __name__(self) -> str: ...
+    @property
+    def __bound__(self) -> Any | None: ...
+    @property
+    def __constraints__(self) -> tuple[Any, ...]: ...
+    @property
+    def __covariant__(self) -> bool: ...
+    @property
+    def __contravariant__(self) -> bool: ...
+    if sys.version_info >= (3, 12):
+        @property
+        def __infer_variance__(self) -> bool: ...
+        def __init__(
+            self,
+            name: str,
+            *constraints: Any,
+            bound: Any | None = None,
+            covariant: bool = False,
+            contravariant: bool = False,
+            infer_variance: bool = False,
+        ) -> None: ...
+    else:
+        def __init__(
+            self, name: str, *constraints: Any, bound: Any | None = None, covariant: bool = False, contravariant: bool = False
+        ) -> None: ...
     if sys.version_info >= (3, 10):
         def __or__(self, right: Any) -> _SpecialForm: ...
         def __ror__(self, left: Any) -> _SpecialForm: ...
@@ -194,7 +212,8 @@ if sys.version_info >= (3, 11):
     LiteralString: _SpecialForm
 
     class TypeVarTuple:
-        __name__: str
+        @property
+        def __name__(self) -> str: ...
         def __init__(self, name: str) -> None: ...
         def __iter__(self) -> Any: ...
         def __typing_subst__(self, arg: Never) -> Never: ...
@@ -202,21 +221,41 @@ if sys.version_info >= (3, 11):
 
 if sys.version_info >= (3, 10):
     class ParamSpecArgs:
-        __origin__: ParamSpec
+        @property
+        def __origin__(self) -> ParamSpec: ...
         def __init__(self, origin: ParamSpec) -> None: ...
 
     class ParamSpecKwargs:
-        __origin__: ParamSpec
+        @property
+        def __origin__(self) -> ParamSpec: ...
         def __init__(self, origin: ParamSpec) -> None: ...
 
     class ParamSpec:
-        __name__: str
-        __bound__: Any | None
-        __covariant__: bool
-        __contravariant__: bool
-        def __init__(
-            self, name: str, *, bound: Any | None = None, contravariant: bool = False, covariant: bool = False
-        ) -> None: ...
+        @property
+        def __name__(self) -> str: ...
+        @property
+        def __bound__(self) -> Any | None: ...
+        @property
+        def __covariant__(self) -> bool: ...
+        @property
+        def __contravariant__(self) -> bool: ...
+        if sys.version_info >= (3, 12):
+            @property
+            def __infer_variance__(self) -> bool: ...
+            def __init__(
+                self,
+                name: str,
+                *,
+                bound: Any | None = None,
+                contravariant: bool = False,
+                covariant: bool = False,
+                infer_variance: bool = False,
+            ) -> None: ...
+        else:
+            def __init__(
+                self, name: str, *, bound: Any | None = None, contravariant: bool = False, covariant: bool = False
+            ) -> None: ...
+
         @property
         def args(self) -> ParamSpecArgs: ...
         @property
@@ -873,3 +912,26 @@ if sys.version_info >= (3, 10):
     def is_typeddict(tp: object) -> bool: ...
 
 def _type_repr(obj: object) -> str: ...
+
+if sys.version_info >= (3, 12):
+    def override(__arg: _F) -> _F: ...
+    @_final
+    class TypeAliasType:
+        def __init__(
+            self, name: str, value: Any, *, type_params: tuple[TypeVar | ParamSpec | TypeVarTuple, ...] = ()
+        ) -> None: ...
+        @property
+        def __value__(self) -> Any: ...
+        @property
+        def __type_params__(self) -> tuple[TypeVar | ParamSpec | TypeVarTuple, ...]: ...
+        @property
+        def __parameters__(self) -> tuple[Any, ...]: ...
+        @property
+        def __name__(self) -> str: ...
+        # It's writable on types, but not on instances of TypeAliasType.
+        @property
+        def __module__(self) -> str | None: ...  # type: ignore[override]
+        def __getitem__(self, parameters: Any) -> Any: ...
+        if sys.version_info >= (3, 10):
+            def __or__(self, right: Any) -> _SpecialForm: ...
+            def __ror__(self, left: Any) -> _SpecialForm: ...