ES|QL: disable SAMPLE generative tests and unmute (#135687)

Disabling generative tests for SAMPLE, that are failing due to
#135336

And unmuting generative tests

Fixes: #134407

Author: luigidellaquila

muted-tests.yml

@@ -588,9 +588,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.qa.single_node.EsqlSpecIT
   method: test {csv-spec:spatial_shapes.ConvertCartesianShapeFromStringParseError}
   issue: https://github.com/elastic/elasticsearch/issues/135455
-- class: org.elasticsearch.xpack.esql.qa.multi_node.GenerativeIT
-  method: test
-  issue: https://github.com/elastic/elasticsearch/issues/134407
 - class: org.elasticsearch.cluster.routing.allocation.decider.RestoreInProgressAllocationDeciderTests
   method: testCanAllocatePrimaryExistingInRestoreInProgress
   issue: https://github.com/elastic/elasticsearch/issues/135566
@@ -603,9 +600,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.heap_attack.HeapAttackIT
   method: testAggTooManyMvLongs
   issue: https://github.com/elastic/elasticsearch/issues/135585
-- class: org.elasticsearch.xpack.esql.qa.single_node.GenerativeIT
-  method: test
-  issue: https://github.com/elastic/elasticsearch/issues/134407
 
 # Examples:
 #

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

@@ -21,7 +21,6 @@
 import org.elasticsearch.xpack.esql.generator.command.pipe.LookupJoinGenerator;
 import org.elasticsearch.xpack.esql.generator.command.pipe.MvExpandGenerator;
 import org.elasticsearch.xpack.esql.generator.command.pipe.RenameGenerator;
-import org.elasticsearch.xpack.esql.generator.command.pipe.SampleGenerator;
 import org.elasticsearch.xpack.esql.generator.command.pipe.SortGenerator;
 import org.elasticsearch.xpack.esql.generator.command.pipe.StatsGenerator;
 import org.elasticsearch.xpack.esql.generator.command.pipe.TimeSeriesStatsGenerator;
@@ -72,7 +71,8 @@ public class EsqlQueryGenerator {
         LookupJoinGenerator.INSTANCE,
         MvExpandGenerator.INSTANCE,
         RenameGenerator.INSTANCE,
-        SampleGenerator.INSTANCE,
+        // awaits fix for https://github.com/elastic/elasticsearch/issues/135336
+        // SampleGenerator.INSTANCE,
         SortGenerator.INSTANCE,
         StatsGenerator.INSTANCE,
         WhereGenerator.INSTANCE