refactor: remove sleep_secs method when waiting the cluster to shutdown

[Phoenix500526]

Please briefly answer these questions: Using a notify logic to instead the sleep logic in some integration test cases

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?)

• what changes does this pull request make?

• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc)

[mergify[bot]]

@Phoenix500526 Convert your pr to draft since CI failed

[mergify[bot]]

@Phoenix500526 You've modified the workflows. Please don't forget to update the .mergify.yml.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.49%. Comparing base (e35b35a) to head (c377994). Report is 83 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #786      +/-   ##
==========================================
- Coverage   75.55%   75.49%   -0.06%     
==========================================
  Files         180      186       +6     
  Lines       26938    27472     +534     
  Branches    26938    27472     +534     
==========================================
+ Hits        20353    20741     +388     
- Misses       5366     5460      +94     
- Partials     1219     1271      +52     

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[mergify[bot]]

@Phoenix500526 Your PR is in conflict and cannot be merged.