feat: 增加Gemini大模型支持

[YoungZM339]

What this PR does / why we need it?

关联issue: #408

Summary of your change

feat: 增加Gemini大模型支持

注：使用Gemini API需要确保程序所在服务器位于Gemini API所支持的地区，否则不仅无法调用，而且无法进入Google AI Studio。

Gemini API不是Vertex AI Gemini API（基于Google Vertex AI平台的Gemini API），Google AI Gemini API 与 Vertex AI Gemini API不是同一平台，尽管均属于Google。

Please indicate you've done the following:

• [Y] Made sure tests are passing and test coverage is added if needed.
• [Y] Made sure commit message follow the rule of Conventional Commits specification.
• [Y] Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

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[shaohuzhang1]

AzureOpenAI 的修改最好能兼容历史版本

[YoungZM339]

AzureOpenAI 的修改最好能兼容历史版本

#439 (comment)
感谢指导，闲时会再调研一下怎么处理Azure OpenAI历史版本比较合适