executor: fix the fail of triggering topn fallback action (#56187)

[ti-chi-bot]

This is an automated cherry-pick of #56187

What problem does this PR solve?

Issue Number: close #56185

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.

fix the issue that fails to trigger the fallback action of topn executor

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.3-20240927-v8.3.0@1a0c3ac). Learn more about missing BASE report.

Additional details and impacted files

@@                       Coverage Diff                        @@
##             release-8.3-20240927-v8.3.0     #56370   +/-   ##
================================================================
  Coverage                               ?   74.7802%           
================================================================
  Files                                  ?       1576           
  Lines                                  ?     440646           
  Branches                               ?          0           
================================================================
  Hits                                   ?     329516           
  Misses                                 ?      90881           
  Partials                               ?      20249           

Flag	Coverage Δ
integration	49.0967% <71.4285%> (?)
unit	71.8721% <100.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.9567% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	52.4961% <0.0000%> (?)

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-27 07:45:04.91045547 +0000 UTC m=+1811174.650879406: ☑️ agreed by wshwsh12.
• 2024-09-27 08:02:13.340663262 +0000 UTC m=+1812203.081087197: ☑️ agreed by xzhangxian1008.

[xzhangxian1008]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wshwsh12, xzhangxian1008

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