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

```diff @@ 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.