dxf: refactor failpoints on task executor

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #57497

Problem Summary:

What changed and how does it work?

as title, also refactor some code in testutil

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.

None

[tiprow]

Hi @D3Hunter. Thanks for your PR.

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[D3Hunter]

this one is merge into TestFrameworkRunSubtaskCancelOrFailed

[codecov]

Codecov Report

Attention: Patch coverage is 97.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.3555%. Comparing base (9ff83eb) to head (6bcf8d1).
Report is 8 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #57680        +/-   ##
================================================
+ Coverage   72.8226%   73.3555%   +0.5328%     
================================================
  Files          1677       1677                
  Lines        463828     465151      +1323     
================================================
+ Hits         337772     341214      +3442     
+ Misses       105217     103155      -2062     
+ Partials      20839      20782        -57     

Flag	Coverage Δ
integration	43.5418% <0.0000%> (?)
unit	72.1912% <97.5000%> (-0.0304%)	⬇️

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

Components	Coverage Δ
dumpling	52.7673% <ø> (ø)
parser	∅ <ø> (∅)
br	45.5293% <ø> (+0.0030%)	⬆️

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-25 10:45:24.895768733 +0000 UTC m=+460512.515423249: ☑️ agreed by lance6716.
• 2024-11-26 02:31:24.113349176 +0000 UTC m=+517271.733003697: ☑️ agreed by tangenta.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lance6716, tangenta, wjhuang2016

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Needs approval from an approver in each of these files:

• OWNERS [lance6716,tangenta,wjhuang2016]
• pkg/disttask/OWNERS [lance6716,tangenta,wjhuang2016]

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[D3Hunter]

/retest

[tiprow]

@D3Hunter: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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