ci: use .nvmrc for node versioning in workflows

[adamalston]

Closes #18735

Updated workflows to use .nvmrc for Node versioning.

Changelog

Changed

• Updated workflows to use .nvmrc for Node versioning.

Testing / Reviewing

I added a TODO that I'm curious to hear thoughts on.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.26%. Comparing base (78263b3) to head (b94924b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #18736   +/-   ##
=======================================
  Coverage   84.26%   84.26%           
=======================================
  Files         408      408           
  Lines       14661    14661           
  Branches     4797     4827   +30     
=======================================
  Hits        12354    12354           
- Misses       2143     2144    +1     
+ Partials      164      163    -1     

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[kennylam]

You're right, this should be updated as well. I think we can scrap cache as well. Thanks!