GoogleGenAiChatModel 在与文本或思考部分结合时无法识别工具调用

Bug description The GoogleGenAiChatModel fails to detect and extract tool calls when a model response contains a mix of text (or thought) parts and functionCall parts. This is caused by a strict allMatch check in responseCandidateToGeneration. If a response contains both reasoning text and a function call, the function call is ignored, and the tool-calling loop breaks.