[8.x] [ES|QL] Marks tech preview functions in the editor (#199631)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• [ES|QL] Marks tech preview functions in the editor (#199631)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 99ea310

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/esql-validation-autocomplete	190	191	+1

Async chunks

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

id	before	after	diff
securitySolution	13.4MB	13.4MB	+1.4KB

Page load bundle

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

id	before	after	diff
kbnUiSharedDeps-srcJs	3.4MB	3.4MB	+1.4KB

Unknown metric groups

API count

id	before	after	diff
@kbn/esql-validation-autocomplete	202	203	+1

cc @stratoula