multiple: implement ls_params (#22621)

implement ls_params for ai21, fireworks, groq.

libs/partners/groq/tests/unit_tests/test_standard.py

@@ -13,14 +13,3 @@ class TestGroqStandard(ChatModelUnitTests):
     @pytest.fixture
     def chat_model_class(self) -> Type[BaseChatModel]:
         return ChatGroq
-
-    @pytest.mark.xfail(reason="Not implemented.")
-    def test_standard_params(
-        self,
-        chat_model_class: Type[BaseChatModel],
-        chat_model_params: dict,
-    ) -> None:
-        super().test_standard_params(
-            chat_model_class,
-            chat_model_params,
-        )