[DNM] Investigate CircleCI Flaky tests

[valeriupredoi]

As reported by @bouweandela in #3069

• my take is there is a caching issue on CircleCI since we don't see those tests fail on GHA - but alas, the test with upstream dev pkgs is not run there (on GHA)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.16%. Comparing base (e4bd4b1) to head (519e26c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3084   +/-   ##
=======================================
  Coverage   96.16%   96.16%           
=======================================
  Files         270      270           
  Lines       15824    15824           
=======================================
  Hits        15217    15217           
  Misses        607      607           

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[valeriupredoi]

hey @bouweandela - it IS a caching issue on Circle, I ran this here a bazillion times (OK real runs: 13-14 maybe 15 I reckon), and no flakes. Problem is, the caching issue might have been sorted out on Circle in the meantime (maybe just a bad SSD or configuration), so if we adopt this one we are taking a hit in runtime (about 20-30%) with no reason. What do you reckon?

[valeriupredoi]

patched by @bouweandela in #3086