Invalid Bedrock Model IDs

Model IDs for some models in the Claude (Anthropic), Llama, and Deepseek are incorrectly prefixed by `us.`
The correct model ID should not have a prefix and the prefix must be added dynamically depending on the AWS Region.

See https://docs.aws.amazon.com/bedrock/latest/userguide/inference-profiles-support.html for region <-> prefix mapping