WIP - Please ignore - Node 19 intl repro

[justingrant]

This is a test PR to try to repro a Node 19 issue that shows up in CI running Node 19.2.0 but not on my local Node 19.2.0 install.

For now, please ignore.

[codecov]

Codecov Report

Merging #2450 (7774bfe) into main (4211309) will decrease coverage by 0.31%.
The diff coverage is n/a.

❗ Current head 7774bfe differs from pull request most recent head ace3b2d. Consider uploading reports for the commit ace3b2d to get more accurate results

@@            Coverage Diff             @@
##             main    #2450      +/-   ##
==========================================
- Coverage   94.65%   94.34%   -0.32%     
==========================================
  Files          20       20              
  Lines       11152    11152              
  Branches     1979     1950      -29     
==========================================
- Hits        10556    10521      -35     
- Misses        548      591      +43     
+ Partials       48       40       -8     

Impacted Files	Coverage Δ
polyfill/lib/intl.mjs	88.93% <0.00%> (-8.90%)	⬇️
polyfill/lib/calendar.mjs	81.34% <0.00%> (-0.10%)	⬇️
polyfill/runtest262.mjs	87.59% <0.00%> (+4.37%)	⬆️

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[justingrant]

The reason why I wasn't seeing this on my local machine but was seeing it in CI turned out to be that GH Actions' Node 19 installs use ICU 72, while the versions available for download from nodejs's website and via homebrew use ICU 71. The root cause of the failures was this CLDR bug: https://unicode-org.atlassian.net/browse/CLDR-16243.

Closing in favor of the original PR #2448.