patch: remove usage of llm, chat model __call__ (#20788)

- `llm(prompt)` -> `llm.invoke(prompt)`
- `llm(prompt=prompt` -> `llm.invoke(prompt)` (same with `messages=`)
- `llm(prompt, callbacks=callbacks)` -> `llm.invoke(prompt,
config={"callbacks": callbacks})`
- `llm(prompt, **kwargs)` -> `llm.invoke(prompt, **kwargs)`

libs/community/langchain_community/llms/yuan2.py

@@ -26,7 +26,7 @@ class Yuan2(LLM):
                 top_k=40,
             )
             print(yuan_llm)
-            print(yuan_llm("你是谁？"))
+            print(yuan_llm.invoke("你是谁？"))
     """
 
     infer_api: str = "http://127.0.0.1:8000/yuan"
@@ -137,7 +137,7 @@ class Yuan2(LLM):
         Example:
             .. code-block:: python
 
-                response = yuan_llm("你能做什么?")
+                response = yuan_llm.invoke("你能做什么?")
         """
 
         if self.use_history: