Documents that the VALUES aggregate function returns unique documents
and points folks to the TOP aggregate function if they want to keep
dupes.
Closes#128091
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Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Building on the work started in https://github.com/elastic/elasticsearch/pull/123904, we now want to auto-generate most of the small subfiles from the ES|QL functions unit tests.
This work also investigates any remaining discrepancies between the original asciidoc version and the new markdown, and tries to minimize differences so the docs do not look too different.
The kibana json and markdown files are moved to a new location, and the operator docs are a little more generated than before (although still largely manual).