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/tests/integration_tests/llms/test_manifest.py

@@ -8,5 +8,5 @@ def test_manifest_wrapper() -> None:
 
     manifest = Manifest(client_name="openai")
     llm = ManifestWrapper(client=manifest, llm_kwargs={"temperature": 0})
-    output = llm("The capital of New York is:")
+    output = llm.invoke("The capital of New York is:")
     assert output == "Albany"