docs: Add Qdrant + Langchain tracing example (#2634)

* feat: Added qdrant langchain instrumentation tutorial with search and retrieval notebook under tutorials

* Clean up qdrant notebook

* Remove unused notebook features and improve flow

* Remove references to unused initialization datasets

* Clarify some explanations

* Address feedback

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Co-authored-by: ruiciroT <ruiciro.r@turing.com>