[DOCS] Add link from ES anonymous access to Kibana anonymous feature #73022
Description
The Elasticsearch Anonymous access feature is useful, but it's the wrong tool for people who want provide anonymous access to Kibana.
For that, they should use the Kibana Anonymous authentication feature.
However, the ES feature tends to show up in searches more frequently, and people try to use it to solve their Kibana access needs, and end having a bad time.
We should add a NOTE at the top of the ES page, guiding people to the Kibana page if they want to provide anonymous access to Kibana (including embedding Kibana in an iframe).