[8.17] [ES3] Enable AI assistant knowledge base (#202210)

[kibanamachine]

Backport

This will backport the following commits from main to 8.17:

• [ES3] Enable AI assistant knowledge base (#202210)

Questions ?

Please refer to the Backport tool documentation

[github-actions[bot]]

:robot: GitHub comments

Expand to view the GitHub comments

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!)

[elasticmachine]

:yellow_heart: Build succeeded, but was flaky

• Buildkite Build
• Commit: 20c720aa3619e3138f5cfe9103fdf5b3103f6dfe

Failed CI Steps

• Jest Integration Tests #1

Test Failures

• [job] [logs] Jest Integration Tests #1 / Http1BasePathProxyServer shouldRedirect it will NOT redirect if it is not a GET verb

Metrics [docs]

Page load bundle

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

id	before	after	diff
searchAssistant	4.8KB	4.9KB	+104.0B
serverlessObservability	28.9KB	28.9KB	-29.0B
serverlessSearch	21.4KB	21.9KB	+495.0B
total			+570.0B

cc @sphilipse