Fix/update tutotial aws connector cache

[crystalyw]

This PR addresses the following issues

• Closes Add cached results for AWS Bedrock Titan example in "Connecting to GenAI Models" tutorial #82 - add AWS cache to connector tutorial
• Closes Add cached results for HuggingFace example in "Connecting to GenAI Models" tutorial #93 - add HR cache to connector tutorial

Additional changes in this PR

• Clean up explanations in Connecting to Gen AI Models
• Add missing timedelta import in Advanced Tutorials: Cache Management

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