[ESQL] Fix match phrase tests not being deterministic (#129724)

Closes #129676

Author: ivancea

muted-tests.yml

@@ -565,9 +565,6 @@ tests:
 - class: org.elasticsearch.test.apmintegration.TracesApmIT
   method: testApmIntegration
   issue: https://github.com/elastic/elasticsearch/issues/129651
-- class: org.elasticsearch.xpack.esql.qa.multi_node.EsqlSpecIT
-  method: test {scoring.TestMatchPhraseWithScoreBoost ASYNC}
-  issue: https://github.com/elastic/elasticsearch/issues/129676
 - class: org.elasticsearch.search.query.RescoreKnnVectorQueryIT
   method: testKnnSearchRescore
   issue: https://github.com/elastic/elasticsearch/issues/129713

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

@@ -567,11 +567,12 @@ required_capability: metadata_score
 from books metadata _score
 | where match_phrase(title, "J. R. R. Tolkien")
 | keep book_no, title, author, _score
+| sort _score desc
 ;
 
 book_no:keyword | title:text                            | author:text                                      | _score:double    
-    5335            | Letters of J R R Tolkien              | J.R.R. Tolkien                                   | 9.017186164855957
-    2130            | The J. R. R. Tolkien Audio Collection | [Christopher Tolkien, John Ronald Reuel Tolkien] | 8.412636756896973
+    5335        | Letters of J R R Tolkien              | J.R.R. Tolkien                                   | 9.017186164855957
+    2130        | The J. R. R. Tolkien Audio Collection | [Christopher Tolkien, John Ronald Reuel Tolkien] | 8.412636756896973
 ;
 
 testMatchPhraseWithScoreBoost
@@ -580,9 +581,10 @@ required_capability: match_phrase_function
 from books metadata _score
 | where match_phrase(title, "J. R. R. Tolkien", {"boost": 5})
 | keep book_no, title, author, _score
+| sort _score desc
 ;
 
 book_no:keyword | title:text                            | author:text                                      | _score:double    
-    5335            | Letters of J R R Tolkien              | J.R.R. Tolkien                                   | 45.0859260559082 
-    2130            | The J. R. R. Tolkien Audio Collection | [Christopher Tolkien, John Ronald Reuel Tolkien] | 42.06318283081055
+    5335        | Letters of J R R Tolkien              | J.R.R. Tolkien                                   | 45.0859260559082 
+    2130        | The J. R. R. Tolkien Audio Collection | [Christopher Tolkien, John Ronald Reuel Tolkien] | 42.06318283081055
 ;