Modernize the Node.js getinfo.mjs example

[Snuffleupagus]

• Fix metadata logging, since it's accidentally broken by PR [api-minor] Replace various getAll methods with iterators #19778 (over a year ago).
• Modernize, and simplify, the example by using await to remove the promise chains.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.20%. Comparing base (0f26334) to head (fbf36b6).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #21811   +/-   ##
=======================================
  Coverage   90.20%   90.20%           
=======================================
  Files         264      264           
  Lines       67339    67339           
=======================================
  Hits        60741    60741           
  Misses       6598     6598           

Flag	Coverage Δ
unittestcli	56.92% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.