Deangularize Dashboard

[ThomThomson]

Summary

Closes #65614

This PR completely removes Angular from Dashboard, and re-structures the dashboard application into a React Functional Component.

There should be no visual or behavioural changes at all in this PR. Routing, loading, and parts of the state management outside of dashboard_state_manager have been totally replaced, so this PR could use some very thorough testing.

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Unit or functional tests were updated or added to match the most common scenarios
• Any UI touched in this PR is usable by keyboard only (learn more about keyboard accessibility)
• Any UI touched in this PR does not create any new axe failures (run axe in browser: FF, Chrome)
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)
• This was checked for cross-browser compatibility

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[darnautov]

ML changes LGTM

[ryankeairns]

SCSS changes look good.

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[clintandrewhall]

This PR is quite dense. I feel like the difficulty in review could be mitigated by some code style changes and some encapsulation. At the same time, I don't want to over-complicate the remainder of our work on TTV.

I'd be content to have some preliminary fixes (destructuring, for example) and then follow up as we write tests. Thoughts?

[kibanamachine]

⏳ Build in-progress, with failures

• continuous-integration/kibana-ci/pull-request
• Commit: 3974639
• This comment will update when the build is complete

Failed CI Steps

• Execute kibana-ciGroup4
• Execute oss-accessibility
• Execute kibana-ciGroup3

History

• 💔 Build #92758 failed 213d081
• 💔 Build #92591 failed efa435e
• 💚 Build #92491 succeeded bfc3de3
• 💔 Build #92418 failed 0c81703
• 💔 Build #92160 failed 1a45187

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 0b8de95

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
dashboard	197.2KB	186.2KB	-11.1KB

Distributable file count

id	before	after	diff
default	47012	47769	+757
oss	27615	27612	-3

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
dashboard	327.8KB	336.4KB	+8.7KB

History

• 💚 Build #93330 succeeded f4bcfcc
• 💔 Build #93310 failed 880e29a
• 💔 Build #93219 failed 26329de
• 💔 Build #93143 failed 07f33ad
• 💔 Build #92947 failed b7d90f6

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[clintandrewhall]

I'm satisfied with the iterations and improvements, enough to get this checked in and move forward with tweaks, so long as you're confident in the test coverage.

This is a beast of an effort here, @ThomThomson ... incredible work!