[ESQL] Fix TopNSetTestCase test and unmute it (#129327)

Closes #129257

Author: ivancea

muted-tests.yml

@@ -520,9 +520,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.qa.single_node.GenerativeForkIT
   method: test {lookup-join.MultipleBatches*
   issue: https://github.com/elastic/elasticsearch/issues/129210
-- class: org.elasticsearch.compute.data.sort.LongTopNSetTests
-  method: testCrankyBreaker
-  issue: https://github.com/elastic/elasticsearch/issues/129257
 
 # Examples:
 #

x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/data/sort/TopNSetTestCase.java

@@ -189,7 +189,7 @@ public final void testCrankyBreaker() {
                 collect(sort, value);
             }
 
-            assertResults(sort, sortOrder, limit - 1, values);
+            assertResults(sort, sortOrder, limit, values);
         } catch (CircuitBreakingException e) {
             assertThat(e.getMessage(), equalTo(CrankyCircuitBreakerService.ERROR_MESSAGE));
         }