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/aleph_alpha.py

@@ -284,4 +284,4 @@ class AlephAlpha(LLM):
 if __name__ == "__main__":
     aa = AlephAlpha()
 
-    print(aa("How are you?"))  # noqa: T201
+    print(aa.invoke("How are you?"))  # noqa: T201