Reorganize Observability Plugin

[CoenWarmer]

Resolves #153308

📝 Summary

This PR cleans up the Observability app.

There are quite some changes, but the changes themselves are not controversial: they are mostly moving stuff around and throwing away stuff that was moved to other plugins or were no longer used anywhere.

It builds upon all the work done in this epic. If you want to understand the scope of the work, please take some time to check the PRs referenced in the epic.

In order to facilitate the review process I've done my best to categorize the changes in this PR into clearly labelled commits. So if you want to dig in, it might be helpful to review commit by commit.

🔬 Details

List of changes:

• Updated imports of components and hooks which were moved to Observability Shared (commit)
• Move components from /components/shared and /components/app to /components (commit)
• Consolidated all Overview components and helpers inside /pages/overview (commit)
• Remove hooks, components and utilities which were either duplicated and moved to Observability Shared or Exploratory View, or just plain no longer used anywhere anymore (commit, commit)
• Cleaned up /context and /services folders: moved related helpers closer together and removed unused ones (commit, commit)
• Cleaned up plugin.ts and index.ts (commit)
• Update CODEOWNERS file so Actionable Observability owns all folders and components in /x-pack/plugins/observability (commit).

✅ Checklist

• Everything should work as before.

[apmmachine]

🤖 GitHub comments

Expand to view the GitHub comments

Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[shahzad31]

LGTM WFG !!

Obs ui and Uptime changes !!

[alisonelizabeth]

Onboarding changes LGTM. AFAICT the deleted files have already been relocated via #154716 👍

[kdelemme]

🚢 it!

[kdelemme]

👍🏻

[mohamedhamed-ahmed]

Infra changes LGTM!

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 6211a2a
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
observability	410	308	-102

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
observability	540	466	-74

Async chunks

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

id	before	after	diff
observability	972.3KB	906.5KB	-65.9KB

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
observability	25	14	-11

Page load bundle

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

id	before	after	diff
observability	55.8KB	45.6KB	-10.2KB

Unknown metric groups

API count

id	before	after	diff
observability	546	472	-74

async chunk count

id	before	after	diff
observability	14	7	-7

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
observability	33	24	-9
securitySolution	400	404	+4
total			-3

miscellaneous assets size

id	before	after	diff
observability	856.9KB	695.2KB	-161.8KB

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
observability	37	28	-9
securitySolution	480	484	+4
total			-3

History

• 💔 Build #128907 failed 0dc13a7
• 💚 Build #128544 succeeded 0cba277
• 💔 Build #128524 failed 4bb144a5b3e54972c9f3c12b357d88646fa85313
• 💔 Build #128517 failed 719fd1861c168fbe52fa4cadc88253f8cfff1f3b

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