test: add more sleep time for TestMemoryUsageAndOpsHistory test

[Defined2014]

What problem does this PR solve?

Issue Number: close #41455

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.

None

[tiprow]

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[codecov]

Codecov Report

Merging #50921 (4230942) into master (b289dc9) will decrease coverage by 6.5332%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #50921        +/-   ##
================================================
- Coverage   72.3098%   65.7766%   -6.5332%     
================================================
  Files          1466       1466                
  Lines        361114     429701     +68587     
================================================
+ Hits         261121     282643     +21522     
- Misses        80780     127199     +46419     
- Partials      19213      19859       +646     

Flag	Coverage Δ
integration	27.8871% <ø> (?)

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

Components	Coverage Δ
dumpling	56.4771% <ø> (ø)
parser	∅ <ø> (∅)
br	48.0472% <ø> (+1.7460%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-02-02 03:34:25.494133875 +0000 UTC m=+1709307.058431565: ☑️ agreed by zimulala.
• 2024-02-02 03:47:29.208353658 +0000 UTC m=+1710090.772651365: ☑️ agreed by hawkingrei.