[7.x] [Exploratory view] Core web vitals (#100320)

[kibanamachine]

Backports the following commits to 7.x:

• [Exploratory view] Core web vitals ([Exploratory view] Core web vitals #100320)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 98471ee
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
observability	288	289	+1

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
lens	156	160	+4

Async chunks

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

id	before	after	diff
observability	460.9KB	465.1KB	+4.2KB

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
lens	17	16	-1

Unknown metric groups

API count

id	before	after	diff
lens	167	171	+4

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

cc @shahzad31