removed deprecated classes from pipelineai.ipynb, added support for L…

…angChain v0.2 for PipelineAI integration (#24333)

Description: added support for LangChain v0.2 for PipelineAI
integration. Removed deprecated classes and incorporated support for
LangChain v0.2 to integrate with PipelineAI. Removed LLMChain and
replaced it with Runnable interface. Also added StrOutputParser, that
parses LLMResult into the top likely string.

Issue: None

Dependencies: None.

---------

Co-authored-by: Chester Curme <[email protected]>

docs/docs/integrations/llms/pipelineai.ipynb

@@ -50,8 +50,8 @@
    "source": [
     "import os\n",
     "\n",
-    "from langchain.chains import LLMChain\n",
     "from langchain_community.llms import PipelineAI\n",
+    "from langchain_core.output_parsers import StrOutputParser\n",
     "from langchain_core.prompts import PromptTemplate"
    ]
   },
@@ -123,7 +123,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "llm_chain = LLMChain(prompt=prompt, llm=llm)"
+    "llm_chain = prompt | llm | StrOutputParser()"
    ]
   },
   {
@@ -142,7 +142,7 @@
    "source": [
     "question = \"What NFL team won the Super Bowl in the year Justin Beiber was born?\"\n",
     "\n",
-    "llm_chain.run(question)"
+    "llm_chain.invoke(question)"
    ]
   }
  ],