fix: invoke_error is not callable (#15555)

Co-authored-by: 刘江波 <jiangbo721@163.com>

api/core/model_runtime/model_providers/__base/ai_model.py

                         )
                     )
                 elif isinstance(invoke_error, InvokeError):
-                    return invoke_error(description=f"[{self.provider_name}] {invoke_error.description}, {str(error)}")
+                    return InvokeError(description=f"[{self.provider_name}] {invoke_error.description}, {str(error)}")
                 else:
                     return error