Update all notebooks to use native openai integration (#6696)

benchmarks/struct_indices/spider/evaluate.py

benchmarks/struct_indices/spider/generate_sql.py

benchmarks/struct_indices/spider/spider_utils.py

docs/examples/agent/openai_agent_query_cookbook.ipynb

docs/examples/agent/openai_agent_query_plan.ipynb

docs/examples/callbacks/LlamaDebugHandler.ipynb

docs/examples/callbacks/TokenCountingHandler.ipynb

docs/examples/callbacks/WandbCallbackHandler.ipynb

docs/examples/chat_engine/chat_engine_react.ipynb

docs/examples/citation/pdf_page_reference.ipynb

...sable_indices/city_analysis/City_Analysis-Decompose.ipynb

...e_indices/city_analysis/City_Analysis-Unified-Query.ipynb

...ples/composable_indices/city_analysis/City_Analysis.ipynb

...ble_indices/city_analysis/PineconeDemo-CityAnalysis.ipynb

docs/examples/customization/llms/AzureOpenAI.ipynb

...examples/customization/llms/SimpleIndexDemo-ChatGPT.ipynb

...ustomization/llms/SimpleIndexDemo-Huggingface_camel.ipynb

...omization/llms/SimpleIndexDemo-Huggingface_stablelm.ipynb

...s/customization/streaming/SimpleIndexDemo-streaming.ipynb

...aming/chat_engine_condense_question_stream_response.ipynb