Remove preview from ESQL docs

Author: carlosdelest

docs/reference/query-languages/esql/_snippets/lists/search-functions.md

@@ -1,4 +1,4 @@
-* [preview] [`KQL`](../../functions-operators/search-functions.md#esql-kql)
-* [preview] [`MATCH`](../../functions-operators/search-functions.md#esql-match)
-* [preview] [`QSTR`](../../functions-operators/search-functions.md#esql-qstr)
-% * [preview] [`TERM`](../../functions-operators/search-functions.md#esql-term)
+* [`KQL`](../../functions-operators/search-functions.md#esql-kql)
+* [`MATCH`](../../functions-operators/search-functions.md#esql-match)
+* [`QSTR`](../../functions-operators/search-functions.md#esql-qstr)
+% * [`TERM`](../../functions-operators/search-functions.md#esql-term)

docs/reference/query-languages/esql/limitations.md

@@ -105,7 +105,6 @@ In addition, when [querying multiple indexes](docs-content://explore-analyze/que
 
 ## Full-text search [esql-limitations-full-text-search]
 
-[preview] {{esql}}'s support for [full-text search](/reference/query-languages/esql/functions-operators/search-functions.md) is currently in Technical Preview.
 One limitation of full-text search is that it is necessary to use the search function,
 like [`MATCH`](/reference/query-languages/esql/functions-operators/search-functions.md#esql-match),
 in a [`WHERE`](/reference/query-languages/esql/commands/processing-commands.md#esql-where) command directly after the