Fixes: #1378 - Add warnings for unsupported frequency/presence penalty in Anthropic API - Add warnings for unsupported frequency/presence penalty and topK in BedrockProxyChatModel - Add warning for unsupported topK in OpenAI chat models - Implement frequency and presence penalty parameters for Vertex AI Gemini model - Update Vertex AI Gemini options and tests Signed-off-by: Soby Chacko <soby.chacko@broadcom.com>