[8.x] [ES|QL] Generate docs and functions (#203210) (#203237)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[ES|QL] Generate docs and functions
(#203210)](#203210)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Generate docs and functions (#203210)\n\n## Summary\r\n\r\nUpdates the
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Generate docs and
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Generate docs and functions (#203210)\n\n## Summary\r\n\r\nUpdates the
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Generate docs and functions (#203210)\n\n## Summary\r\n\r\nUpdates the
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ES","sha":"2cd6dc3ff17374901189916a3a042cb8add433ed"}},{"branch":"8.x","label":"v8.18.0","branchLabelMappingKey":"^v8.18.0$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Stratoula Kalafateli <[email protected]>

Author: kibanamachine