test: enforce better never-settling-promise detection

[aduh95]

Tests should be explicit regarding whether a promise is expected to settle, and the test should fail when the behavior does not meet expectations.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.53%. Comparing base (37d9cfc) to head (f510bd2).
⚠️ Report is 24 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #60976      +/-   ##
==========================================
+ Coverage   88.51%   88.53%   +0.02%     
==========================================
  Files         703      703              
  Lines      208430   208430              
  Branches    40198    40202       +4     
==========================================
+ Hits       184491   184540      +49     
+ Misses      15951    15897      -54     
- Partials     7988     7993       +5     

see 50 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/70404/

[nodejs-github-bot]

Landed in e50cbc1