disttask: fix flaky slot manager test

[ywqzzy]

What problem does this PR solve?

Issue Number: close #52252

Problem Summary:

What changed and how does it work?

Make sure mock close is registered

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 @ywqzzy. Thanks for your PR.

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[ywqzzy]

/check-issue-triage-complete

[ywqzzy]

/check-issue-triage-complete

[hawkingrei]

/ok-to-test

[zimulala]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-01 04:03:27.506298542 +0000 UTC m=+243869.033839088: ☑️ agreed by hawkingrei.
• 2024-04-02 01:45:55.751016991 +0000 UTC m=+322017.278557537: ☑️ agreed by zimulala.

[codecov]

Codecov Report

Merging #52271 (0f51d5d) into master (b1c0e36) will increase coverage by 1.9103%.
Report is 29 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52271        +/-   ##
================================================
+ Coverage   70.6738%   72.5842%   +1.9103%     
================================================
  Files          1491       1496         +5     
  Lines        440116     443376      +3260     
================================================
+ Hits         311047     321821     +10774     
+ Misses       109532     101322      -8210     
- Partials      19537      20233       +696     

Flag	Coverage Δ
integration	48.8680% <ø> (?)
unit	70.4573% <ø> (-0.0254%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	50.3134% <ø> (+4.5133%)	⬆️

[ywqzzy]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, okJiang, ywqzzy, zimulala

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