[Fix](Nereids) Group by binding should be consistent with the behavior of the old optimizer #15484
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Proposed changes
Issue Number: close #15328
Problem summary
The behavior of group by binding is consistent with the old optimizer, and it will be changed to the SQL standard in the future. It will be obtained from the child first, and then obtained from the output of the operator.
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Further comments
If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...