[Obs AI Assistant] Add settings to serverless allowlist

[neptunian]

Resolves #190089

• Adds AI Assistant settings to allowlist in serverless. They will appear in both "Advanced Settings" and "AI Assistant for Observability" settings
• Updates card text to fix title casing and have a more meaningful description

[obltmachine]

🤖 GitHub comments

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Just comment with:

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

[neptunian]

/ci

[neptunian]

/ci

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: d14dbd7

Failed CI Steps

Metrics [docs]

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
@kbn/management-settings-ids	137	141	+4

Page load bundle

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

id	before	after	diff
serverlessObservability	27.0KB	27.0KB	+30.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/management-settings-ids	139	143	+4

History

• 💛 Build #226408 was flaky 13db8d1

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

[eokoneyo]

Code review only.