Following Amazon Bedrock's recommendations, deprecate individual model chat implementations (Anthropic, Cohere, Llama, Titan, etc.)
in favor of the unified BedrockProxyChatModel. This change promotes the use of Bedrock's Converse API which offers
benefits like model flexibility, extended functionality, and native tool support.
The Converse API does not support embedding operations, so these will remain in the current API and the embedding
model functionality in the existing InvokeModel API will be maintained
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