ESQL: Make a test consistent (elastic#127234)

Had to sort.

Relates to elastic#127199

Author: nik9000

x-pack/plugin/esql/qa/server/single-node/src/javaRestTest/java/org/elasticsearch/xpack/esql/qa/single_node/PushQueriesIT.java

@@ -124,7 +124,14 @@ private void testPushQuery(String value, String esqlQuery, String luceneQuery, b
                     matcher = matcher.item("ProjectOperator").item("ExchangeSinkOperator");
                     assertMap(sig, matcher);
                 }
-                case "node_reduce" -> assertMap(sig, matchesList().item("ExchangeSourceOperator").item("ExchangeSinkOperator"));
+                case "node_reduce" -> {
+                    if (sig.contains("LimitOperator")) {
+                        // TODO figure out why this is sometimes here and sometimes not
+                        assertMap(sig, matchesList().item("ExchangeSourceOperator").item("LimitOperator").item("ExchangeSinkOperator"));
+                    } else {
+                        assertMap(sig, matchesList().item("ExchangeSourceOperator").item("ExchangeSinkOperator"));
+                    }
+                }
                 case "final" -> assertMap(
                     sig,
                     matchesList().item("ExchangeSourceOperator").item("LimitOperator").item("ProjectOperator").item("OutputOperator")

x-pack/plugin/esql/qa/testFixtures/src/main/resources/string.csv-spec

@@ -2331,6 +2331,7 @@ mvStringNotEquals
 FROM mv_text
 | WHERE message != "Connected to 10.1.0.2"
 | KEEP @timestamp, message
+| SORT @timestamp ASC
 ;
 warning:Line 2:9: evaluation of [message != \"Connected to 10.1.0.2\"] failed, treating result as null. Only first 20 failures recorded.
 warning:Line 2:9: java.lang.IllegalArgumentException: single-value function encountered multi-value