ES|QL: reduce max limit in generative tests (#137006)

Author: luigidellaquila

muted-tests.yml

@@ -525,9 +525,6 @@ tests:
 - class: org.elasticsearch.xpack.inference.qa.mixed.CohereServiceMixedIT
   method: testRerank
   issue: https://github.com/elastic/elasticsearch/issues/136872
-- class: org.elasticsearch.xpack.esql.qa.single_node.GenerativeIT
-  method: test
-  issue: https://github.com/elastic/elasticsearch/issues/136850
 - class: org.elasticsearch.xpack.inference.qa.mixed.CohereServiceMixedIT
   method: testCohereEmbeddings
   issue: https://github.com/elastic/elasticsearch/issues/136779

x-pack/plugin/esql/qa/testFixtures/src/main/java/org/elasticsearch/xpack/esql/generator/command/pipe/LimitGenerator.java

@@ -28,7 +28,7 @@ public CommandDescription generate(
         QuerySchema schema,
         QueryExecutor executor
     ) {
-        int limit = randomIntBetween(0, 15000);
+        int limit = randomIntBetween(0, 2000);
         String cmd = " | limit " + limit;
         return new CommandDescription(LIMIT, this, cmd, Map.ofEntries(Map.entry(LIMIT, limit)));
     }