Add an option to stream for Gemini.

[Hisir0909]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

It is possible that the gemini interface's review mechanism causes the stream interface to have a duration that is three times longer than the no stream interface.
Model: gemini-1.5-flash

2. Additional context or comments

Someone told me how to add whether to use stream configuration for LLM nodes.

3. Can you help us with this feature?

• I am interested in contributing to this feature.

[AAEE86]

Sorry, I didn't notice that you checked the third item. If you submit a pull request, I can close it.

[Hisir0909]

Sorry, I didn't notice that you checked the third item. If you submit a pull request, I can close it.抱歉，我没注意到您勾选了第三项。如果您提交拉取请求，我可以关闭它。

Thank you. If what you submitted can be used, that’s fine. I'm just not clear on how the stream parameter is passed in, so I'm unsure if adding it directly in the YAML is effective.

[Hisir0909]

In fact, @AAEE86 ‘s pr is incorrect. Simply adding the stream flag in the YAML file is ineffective; it's passed to the model's internal parameters, not to the stream flag itself.

[AAEE86]

I found this problem and created a new issue #8998
Can you solve this problem?