[Bug] group_concat does not support DISTINCT

[Level1Accelerator]

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• I had searched in the issues and found no similar issues.

Version

doris 1.0

What's Wrong?

group_concat does not support DISTINCT

What You Expected?

group_concat support DISTINCT

How to Reproduce?

No response

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[stalary]

I will try to solve the problem, please assign to me.