Add node 20 to test matrix

[dyladan]

Adding node 20 to see what fails in the tooling. Lots of our tooling has been updated since last time I tried this.

All changes previously reviewed in #4295

[codecov]

Codecov Report

Merging #4336 (1447ad5) into main (593d220) will decrease coverage by 0.09%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4336      +/-   ##
==========================================
- Coverage   92.29%   92.21%   -0.09%     
==========================================
  Files         330      332       +2     
  Lines        9426     9439      +13     
  Branches     1999     2000       +1     
==========================================
+ Hits         8700     8704       +4     
- Misses        726      735       +9     

Files	Coverage Δ
...entelemetry-instrumentation/src/instrumentation.ts	80.00% <100.00%> (ø)
...ntation/src/instrumentationNodeModuleDefinition.ts	14.28% <ø> (ø)
...strumentation/src/instrumentationNodeModuleFile.ts	33.33% <ø> (ø)

... and 1 file with indirect coverage changes

[dyladan]

@trentm per your question yesterday it seems that the tooling is actually no longer in the way here. Backported fixes from next and it seems like we're all good

[trentm]

it seems that the tooling is actually no longer in the way here

Nice.

[pichlermarc]

🎉

[pichlermarc]

Do we want to add it to the list of officially supported runtimes (in the readme)? 🤔
If so, we may also want to link this issue (#3774) with this PR :)