Add slow markers on >60s restraint tests

[IAlibay]

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• I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

[github-actions]

No API break detected ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.14%. Comparing base (ffbc04d) to head (02b0aab).
⚠️ Report is 90 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1441      +/-   ##
==========================================
- Coverage   95.18%   93.14%   -2.05%     
==========================================
  Files         165      165              
  Lines       12431    12433       +2     
==========================================
- Hits        11833    11581     -252     
- Misses        598      852     +254     

Flag	Coverage Δ
fast-tests	93.14% <100.00%> (?)
slow-tests	?

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