MMT-4019: Upgrading to Node20

[mandyparson]

Overview

What is the feature?

Updating from node.js 18 to node.js 20

What is the Solution?

bumping up to lts/iron was not building in bamboo. Settled on a solution from this thread in which a user reported that 20.18.1 worked serverless/serverless#12936. lts/iron uses 20.19.2.

What areas of the application does this impact?

yml files
Note that some test files changed but that is likely due to how react-select generates classnames, not something we changed on our end.

Testing

Reproduction steps

• **Environment for testing: This has been deployed to sit so can test via mmt.sit

1. Go to mmt.sit and perform regression testing to see if anything has changed/isn't working anymore.

Attachments

Please include relevant screenshots or files that would be helpful in reviewing and verifying this change.

Checklist

• I have added automated tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.94%. Comparing base (7e0bcd9) to head (60cd713).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1380   +/-   ##
=======================================
  Coverage   97.94%   97.94%           
=======================================
  Files         406      406           
  Lines        6615     6615           
  Branches     1384     1385    +1     
=======================================
  Hits         6479     6479           
  Misses        135      135           
  Partials        1        1           

☔ View full report in Codecov by Sentry.
📢 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.