planner: fix agg push down rule mistake order by item inside agg function (#50002)

[ti-chi-bot]

This is an automated cherry-pick of #50002

What problem does this PR solve?

Issue Number: close #49986

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

planner: fix agg push down rule mistake order by item inside agg function

[fixdb]

+1

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, fixdb

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-01-23 14:50:03.611950587 +0000 UTC m=+885845.176248290: ☑️ agreed by AilinKid.
• 2024-01-23 20:57:02.260793488 +0000 UTC m=+907863.825091192: ☑️ agreed by fixdb.

[AilinKid]

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@cd073ea). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #50016   +/-   ##
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  Coverage               ?   73.6411%           
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  Lines                  ?     350611           
  Branches               ?          0           
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  Hits                   ?     258194           
  Misses                 ?      75818           
  Partials               ?      16599