fix: in reviews stats tests: Ignore the timestamp elements, just check that the data is correct

[evyncke]

Address #11123 by ignoring the timestamp elements, just check that the other data is correct

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.57%. Comparing base (4641d0d) to head (27fb48b).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11124      +/-   ##
==========================================
+ Coverage   88.51%   88.57%   +0.06%     
==========================================
  Files         334      333       -1     
  Lines       45102    44621     -481     
==========================================
- Hits        39924    39525     -399     
+ Misses       5178     5096      -82     

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