add langchain rag genai notebook (#2663)

Author: openvino-dev-samples

.ci/ignore_convert_execution.txt

@@ -57,4 +57,5 @@ notebooks/llm-agent-functioncall/llm-agent-functioncall-qwen.ipynb
 notebooks/llm-agent-react/llm-agent-rag-llamaindex.ipynb
 notebooks/mllama-3.2/mllama-3.2.ipynb
 notebooks/llm-agent-react/llm-agent-react.ipynb
-notebooks/multilora-image-generation/multilora-image-generation.ipynb
+notebooks/multilora-image-generation/multilora-image-generation.ipynb
+notebooks/llm-rag-langchain/llm-rag-langchain-genai.ipynb

.ci/ignore_pip_conflicts.txt

@@ -19,3 +19,4 @@ notebooks/yolov10-optimization/yolov10-optimization.ipynb # nncf from git
 notebooks/person-counting-webcam/person-counting.ipynb # numpy should be installed first
 notebooks/parler-tts-text-to-speech/parler-tts-text-to-speech.ipynb # torch >= 2.2
 notebooks/stable-diffusion-v3/stable-diffusion-v3.ipynb # diffusers from git
+notebooks/llm-rag-langchain/llm-rag-langchain-genai.ipynb # nncf@https://github.com/openvinotoolkit/nncf/tree/release_v280

.ci/ignore_treon_docker.txt

@@ -81,4 +81,5 @@ notebooks/pixtral/pixtral.ipynb
 notebooks/llm-agent-react/llm-agent-react.ipynb
 notebooks/multilora-image-generation/multilora-image-generation.ipynb
 notebooks/llm-agent-react/llm-agent-react-langchain.ipynb
-notebooks/multimodal-rag/multimodal-rag-llamaindex.ipynb
+notebooks/multimodal-rag/multimodal-rag-llamaindex.ipynb
+notebooks/llm-rag-langchain/llm-rag-langchain-genai.ipynb

.ci/skipped_notebooks.yml

@@ -558,4 +558,11 @@
 - notebook: notebooks/multimodal-rag/multimodal-rag-llamaindex.ipynb
   skips:
     - os:
-        - macos-13
+        - macos-13
+- notebook: notebooks/llm-rag-langchain/llm-rag-langchain-genai.ipynb
+  skips:
+    - os:
+        - macos-13
+        - ubuntu-20.04
+        - ubuntu-22.04
+        - windows-2019