[bugfix](concat) be crash caused by function concat(ifnull)

[jacktengg]

Proposed changes

Issue Number: close #13692

Problem summary

Describe your changes.

Checklist(Required)

1. Does it affect the original behavior:
   • Yes
   • No
   • I don't know
2. Has unit tests been added:
   • Yes
   • No
   • No Need
3. Has document been added or modified:
   • Yes
   • No
   • No Need
4. Does it need to update dependencies:
   • Yes
   • No
5. Are there any changes that cannot be rolled back:
   • Yes (If Yes, please explain WHY)
   • No

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...

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 38.35 seconds
load time: 566 seconds
storage size: 17154655338 Bytes
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20221026193905_clickbench_pr_34310.html

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 38.61 seconds
load time: 564 seconds
storage size: 17154644858 Bytes
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20221027113047_clickbench_pr_34531.html

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 38.8 seconds
load time: 625 seconds
storage size: 17154875751 Bytes
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20221027063937_clickbench_pr_34614.html

[BiteTheDDDDt]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.