[RAM] Get field caps from kibana event logs

[XavierM]

Summary

We need to get all the fields from our kibana event log so we can populate our KQL bar. So here the API to do that...

That should help #126844.

Checklist

Delete any items that are not applicable to this PR.

• Unit or functional tests were updated or added to match the most common scenarios

[kibana-ci]

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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
eventLog	91	96	+5

Unknown metric groups

API count

id	before	after	diff
eventLog	91	96	+5

ESLint disabled in files

id	before	after	diff
apm	15	14	-1
securitySolution	67	66	-1
uptime	7	6	-1
total			-3

ESLint disabled line counts

id	before	after	diff
apm	88	85	-3
uptime	48	42	-6
total			-9

References to deprecated APIs

id	before	after	diff
fleet	5	4	-1
monitoring	40	28	-12
stackAlerts	183	157	-26
upgradeAssistant	8	3	-5
total			-44

Total ESLint disabled count

id	before	after	diff
apm	103	99	-4
securitySolution	508	507	-1
uptime	55	48	-7
total			-12

History

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

cc @XavierM