[7.x] [Observability] [Cases] Cases in the observability app (#101487)

[stephmilovic]

Backports the following commits to 7.x:

• [Observability] [Cases] Cases in the observability app ([Observability] [Cases] Cases in the observability app #101487)

[stephmilovic]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: ed8dc11
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
cases	253	254	+1
observability	289	313	+24
total			+25

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
cases	395	398	+3
observability	194	195	+1
total			+4

Async chunks

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

id	before	after	diff
cases	503.4KB	505.2KB	+1.8KB
observability	454.0KB	483.4KB	+29.3KB
total			+31.1KB

Page load bundle

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

id	before	after	diff
observability	50.5KB	52.3KB	+1.9KB

Unknown metric groups

API count

id	before	after	diff
cases	431	434	+3
observability	194	195	+1
total			+4

History

• 💔 Build #131471 failed d401978
• 💔 Build #130931 failed c33db04
• 💔 Build #130678 failed 9d7af06

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@elasticmachine merge upstream