Feature/nova converse

[dave-moser]

Description of changes:

• Added support for Amazon Nova models (amazon.nova-micro-v1:0, amazon.nova-lite-v1:0, amazon.nova-pro-v1:0)
• Updated Anthropic Claude models to the latest 3.5 versions (anthropic.claude-3-5-haiku-20241022-v1:0, anthropic.claude-3-5-sonnet-20241022-v2:0)
• Removed older versions of Amazon Titan and Anthropic Claude models (amazon.titan-text-express-v1, anthropic.claude-v1, anthropic.claude-instant-v1, anthropic.claude-v2)
• Refactored Bedrock calls to use the Converse API eliminating the need for custom model specific payloads
• Refactored all model invocation to use Inference Profiles. This is required for Nova models. It is also applied to Anthropic models for consistency and improved scalability.
• Added adaptive retry configuration to Bedrock api calls to add some tolerance for quota throttling exceptions (at the expense of latency)

I tested these changes with both the Main and No-Kendra deployment versions.

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