Support temporary group sessions

[knightdreams6]

Checklist

• I've searched for similar issues and couldn't find anything matching
• I've discussed this feature request in the OpenIMSDK Slack and got positive feedback

Is this feature request related to a problem?

✅ Yes

Problem Description

I use it to try to do real time IM. There are certain concurrent scenarios (such as likes). The SDK will interact a lot with the database during processing, resulting in message consumption that cannot keep up with message accumulation.

Solution Description

Support temporary groups when creating groups (that is, do not store chat messages and only forward messages)

Benefits

Enrich the application scenarios of this project

Potential Drawbacks

No response

Additional Information

No response

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