Fix actor flaky test

[HarelM]

Launch Checklist

This is in continue to the following PR to fix a flaky test:

• Replace Jest with Vitest 2 #4728

It also simplifies the test initialization.

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Link to related issues.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.81%. Comparing base (3f1686e) to head (9dc8435).
Report is 1 commits behind head on main.

❌ We are unable to process any of the uploaded JUnit XML files. Please ensure your files are in the right format.

Additional details and impacted files

@@            Coverage Diff            @@
##             main    #5102     +/-   ##
=========================================
  Coverage   91.80%   91.81%             
=========================================
  Files         279      279             
  Lines       38332    38332             
  Branches     4999     6696   +1697     
=========================================
+ Hits        35192    35194      +2     
+ Misses       3007     3006      -1     
+ Partials      133      132      -1     

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[birkskyum]

Thanks, that's the better solution compared to a retry