test(sync): add test that checks StateSyncRunner runs sync future

[ShahakShama]

• feat(sync): state sync runner runs central sync in background
• test(sync): add test that checks StateSyncRunner runs sync future

[reviewable-StarkWare]

This change is 

[github-actions]

Artifacts upload triggered. View details here

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 4.49%. Comparing base (e3165c4) to head (0c65339).
Report is 541 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #2120       +/-   ##
==========================================
- Coverage   40.10%   4.49%   -35.61%     
==========================================
  Files          26      91       +65     
  Lines        1895    8095     +6200     
  Branches     1895    8095     +6200     
==========================================
- Hits          760     364      -396     
- Misses       1100    7629     +6529     
- Partials       35     102       +67     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles

[AlonLStarkWare]

Reviewed 2 of 3 files at r2, 5 of 5 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ShahakShama)