Fix: Remove core/tools from pyrightconfig.json and fix type errors (#26413)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

api/core/tools/utils/dataset_retriever/dataset_retriever_base_tool.py

@@ -18,6 +18,10 @@ class DatasetRetrieverBaseTool(BaseModel, ABC):
     retriever_from: str
     model_config = ConfigDict(arbitrary_types_allowed=True)
 
+    def run(self, query: str) -> str:
+        """Use the tool."""
+        return self._run(query)
+
     @abstractmethod
     def _run(self, query: str) -> str:
         """Use the tool.