src,lib: add util.markPromiseAsHandled

[jasnell]

Getting tired of seeing promise.catch(() => {}) in places ;-)

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/77003/

[codecov]

Codecov Report

❌ Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.14%. Comparing base (57860ef) to head (d8a9ada).

Files with missing lines	Patch %	Lines
src/node_util.cc	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #65805 +/- ##
==========================================
- Coverage 90.14% 90.14% -0.01% 
==========================================
Files 769 769 Lines 262968 262985 +17 Branches 50052 50068 +16 ==========================================
+ Hits 237049 237064 +15 - Misses 16924 16933 +9 + Partials 8995 8988 -7 

Files with missing lines	Coverage Δ
lib/util.js	100.00% <100.00%> (ø)
src/node_util.cc	81.58% <88.88%> (+0.19%)	⬆️

... and 24 files with indirect coverage changes

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