[8.12] [Obs AI Assistant] Move esql docs to dir that does not get ... (…

…#174583) (#174603)

# Backport

This will backport the following commits from `main` to `8.12`:
- [[Obs AI Assistant] Move esql docs to dir that does not get ...
(#174583)](#174583)

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

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

<!--BACKPORT [{"author":{"name":"Dario
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AI Assistant] Move esql docs to dir that does not get ...
(#174583)\n\nany folder called `docs` is automatically deleted when
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AI Assistant] Move esql docs to dir that does not get ...
(#174583)\n\nany folder called `docs` is automatically deleted when
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AI Assistant] Move esql docs to dir that does not get ...
(#174583)\n\nany folder called `docs` is automatically deleted when
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BACKPORT-->

Co-authored-by: Dario Gieselaar <dario.gieselaar@elastic.co>

x-pack/plugins/observability_ai_assistant/server/functions/esql/index.ts

@@ -30,7 +30,7 @@ const loadSystemMessage = once(async () => {
 });
 
 const loadEsqlDocs = once(async () => {
-  const dir = Path.join(__dirname, './docs');
+  const dir = Path.join(__dirname, './esql_docs');
   const files = (await readdir(dir)).filter((file) => Path.extname(file) === '.txt');
 
   if (!files.length) {