[CI][UT] Fix flaky unit test

[SbloodyS]

Purpose of the pull request

Fix https://github.com/apache/dolphinscheduler/actions/runs/9496972484/job/26172560688?pr=16149

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.70%. Comparing base (8e53f2f) to head (a7b2a40).

❗ Current head a7b2a40 differs from pull request most recent head ed6a835

Please upload reports for the commit ed6a835 to get more accurate results.

Additional details and impacted files

@@             Coverage Diff              @@
##                dev   #16151      +/-   ##
============================================
- Coverage     40.71%   40.70%   -0.01%     
+ Complexity     5247     5245       -2     
============================================
  Files          1385     1385              
  Lines         46109    46109              
  Branches       4923     4923              
============================================
- Hits          18772    18768       -4     
- Misses        25412    25414       +2     
- Partials       1925     1927       +2     

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[ruanwenjun]

I find the default timeout is 30s, is this small?

[SbloodyS]

I find the default timeout is 30s, is this small?

Yes. So I increase it.

[caishunfeng]

LGTM