Spike: Lazy load Monaco (DH-20141)

[bmingles]

Attempt to lazy load Monaco. It is still eagerly loading monaco.js and monaco.css for some reason. Can't figure out why.

[github-actions]

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Details:

Unknown release type "Spike" found in pull request title "Spike: Lazy load Monaco (DH-20141)". 

Available types:
 - feat: A new feature
 - fix: A bug fix
 - docs: Documentation only changes
 - style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
 - refactor: A code change that neither fixes a bug nor adds a feature
 - perf: A code change that improves performance
 - test: Adding missing tests or correcting existing tests
 - build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
 - ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
 - chore: Other changes that don't modify src or test files
 - revert: Reverts a previous commit

[bmingles]

This should be re-enabled. I commented it out to rule out a source of eager loading Monaco