revert GAing full-text functions, to come in followup

Author: leemthompo

docs/reference/query-languages/esql/_snippets/functions/layout/kql.md

@@ -105,6 +105,7 @@ 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

docs/reference/query-languages/esql/_snippets/functions/layout/match.md

@@ -37,9 +37,9 @@ public class Kql extends FullTextFunction {
 
     @FunctionInfo(
         returnType = "boolean",
-        appliesTo = {
-            @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.PREVIEW, version = "9.0.0"),
-            @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.GA, version = "9.1.0") },
+        preview = true,
+        appliesTo = { @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.PREVIEW, version = "9.0.0") },
+        // @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.GA, version = "9.1.0") },
         description = "Performs a KQL query. Returns true if the provided KQL query string matches the row.",
         examples = { @Example(file = "kql-function", tag = "kql-with-field") }
     )

docs/reference/query-languages/esql/_snippets/functions/layout/match_phrase.md

@@ -135,9 +135,9 @@ public class Match extends FullTextFunction implements OptionalArgument, PostAna
 
     @FunctionInfo(
         returnType = "boolean",
-        appliesTo = {
-            @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.PREVIEW, version = "9.0.0"),
-            @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.GA, version = "9.1.0") },
+        preview = true,
+        appliesTo = { @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.PREVIEW, version = "9.0.0") },
+        // @FunctionAppliesTo(lifeCycle = FunctionAppliesToLifecycle.GA, version = "9.1.0") },
         description = """
             Use `MATCH` to perform a <<query-dsl-match-query,match query>> on the specified field.
             Using `MATCH` is equivalent to using the `match` query in the Elasticsearch Query DSL.""",