add tutorial for RAG with DeepSeek R1 model on Sagemaker (opensearch-project#3455)

* add tutorial for RAG with DeepSeek R1 model on Sagemaker

Signed-off-by: Yaliang Wu <[email protected]>

* add tutorials for RAG with DeepSeek Chat model

Signed-off-by: Yaliang Wu <[email protected]>

* add tutorial for RAG with DeepSeek R1 model on Sagemaker

Signed-off-by: Yaliang Wu <[email protected]>

* Apply suggestions from code review

Co-authored-by: kolchfa-aws <[email protected]>
Signed-off-by: Yaliang Wu <[email protected]>

* apply comments to sagemkaer tutorial

Signed-off-by: Yaliang Wu <[email protected]>

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Signed-off-by: Yaliang Wu <[email protected]>
Co-authored-by: kolchfa-aws <[email protected]>

Author: ylwu-amzn