Add from_dict overload for when return_unused_kwargs is a bool

type checkers won't infer Union[Literal[True], Literal[False]] in this case, so we need to manually define it microsoft/pyright#5230

src/transformers/utils/quantization_config.py

@@ -183,6 +183,13 @@ def from_dict(
     ) -> Tuple[Self, Dict[str, Any]]:  # type: ignore[valid-type]
         ...
 
+    @overload
+    @classmethod
+    def from_dict(
+        cls, config_dict: Dict[str, Any], return_unused_kwargs: bool, **kwargs: Any
+    ) -> Union[Self, Tuple[Self, Dict[str, Any]]]:  # type: ignore[valid-type]
+        ...
+
     @classmethod
     def from_dict(
         cls, config_dict: Dict[str, Any], return_unused_kwargs: bool, **kwargs: Any