Fix a performance regression due to uncertain compaction sleep interval

[ahrtr]

Fix #19406

cc @fuweid @serathius @chaochn47 @miancheng7

[k8s-ci-robot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.91%. Comparing base (075fb10) to head (de10fd6).
Report is 2 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
server/storage/mvcc/kvstore_compaction.go	100.00% <100.00%> (ø)

... and 30 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19410      +/-   ##
==========================================
- Coverage   68.92%   68.91%   -0.01%     
==========================================
  Files         420      420              
  Lines       35757    35755       -2     
==========================================
- Hits        24645    24641       -4     
- Misses       9690     9694       +4     
+ Partials     1422     1420       -2     

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[ahrtr]

/cherry-pick release-3.6

[k8s-infra-cherrypick-robot]

@ahrtr: new pull request created: #19411

In response to this:

/cherry-pick release-3.6

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