[Feature](generic-aggregation) some prowork of generic aggregation part 2

[BiteTheDDDDt]

Proposed changes

clean some unused code.

Problem summary

Describe your changes.

Checklist(Required)

• Does it affect the original behavior
• Has unit tests been added
• Has document been added or modified
• Does it need to update dependencies
• Is this PR support rollback (If NO, please explain WHY)

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...

[BiteTheDDDDt]

run buildall

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 33.92 seconds
stream load tsv: 427 seconds loaded 74807831229 Bytes, about 167 MB/s
stream load json: 26 seconds loaded 2358488459 Bytes, about 86 MB/s
stream load orc: 60 seconds loaded 1101869774 Bytes, about 17 MB/s
stream load parquet: 33 seconds loaded 861443392 Bytes, about 24 MB/s
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20230509033721_clickbench_pr_140602.html

[BiteTheDDDDt]

run buildall

[BiteTheDDDDt]

run buildall

[BiteTheDDDDt]

run buildall

[BiteTheDDDDt]

run buildall

[morrySnow]

could we do not change any thing about mv until we have a detail design about it?

[BiteTheDDDDt]

could we do not change any thing about mv until we have a detail design about it?

This pr is currently not related to mv