Revert "refactor: upgrade to node 20"

[10xLaCroixDrinker]

This reverts commit adbff4e.

Description

Revert Node 20 update

Motivation and Context

Deployments with this change failed. Reverting for now so as not to block release until this can be resolved.

How Has This Been Tested?

Prereleased, deployed and validated as v6.11.0-revert-node-20.0

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (adding or updating documentation)
• Dependency update
• Security update

Checklist:

• My change requires a change to the documentation and I have updated the documentation accordingly.
• These changes should be applied to a maintenance branch. (maybe)
• This change requires cross browser checks.
• Performance tests should be ran against the server prior to merging.
• This change impacts caching for client browsers.
• This change impacts HTTP headers.
• This change adds additional environment variable requirements for One App users.
• I have added the Apache 2.0 license header to any new files created.

What is the Impact to Developers Using One App?

[github-actions]

Size Change: 0 B

Total Size: 735 kB

ℹ️ View Unchanged

Filename	Size
./build/app/app.js	187 kB
./build/app/app~vendors.js	411 kB
./build/app/runtime.js	7.07 kB
./build/app/service-worker-client.js	7.25 kB
./build/app/vendors.js	123 kB

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