Nova doesn't support the toolConfig.toolChoice.any field

[Wh1isper]

Describe the bug

This seems not enough for all model: https://github.com/aws-samples/bedrock-access-gateway/blob/main/src/api/models/bedrock.py#L431

if chat_request.tool_choice and not chat_request.model.startswith("meta.llama3-1-"):

Please complete the following information:

• Which API you used: [e.g. /chat/completions]
• Which model you used: [e.g. anthropic.claude-3-sonnet-20240229-v1:0]

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Expected behavior
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