[8.x] Make ES|QL scoring tests running consistently in serverless (#118854) (#118928)

* Make ES|QL scoring tests running consistently in serverless (#118854)

* make scoring tests running consistently in serverless

enforce _id in books dataset to make doc distribution across shards consistent.
books settings with 3 shards to accomodate serverless settings.
unmuting scoring tests.
scoring test fixed.

(cherry picked from commit 140beb1)

Author: tteofili

muted-tests.yml

@@ -364,21 +364,6 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/117591
 - class: org.elasticsearch.repositories.s3.RepositoryS3ClientYamlTestSuiteIT
   issue: https://github.com/elastic/elasticsearch/issues/117596
-- class: "org.elasticsearch.xpack.esql.qa.multi_node.EsqlSpecIT"
-  method: "test {scoring.*}"
-  issue: https://github.com/elastic/elasticsearch/issues/117641
-- class: "org.elasticsearch.xpack.esql.qa.single_node.EsqlSpecIT"
-  method: "test {scoring.*}"
-  issue: https://github.com/elastic/elasticsearch/issues/117641
-- class: "org.elasticsearch.xpack.esql.qa.mixed.MixedClusterEsqlSpecIT"
-  method: "test {scoring.*}"
-  issue: https://github.com/elastic/elasticsearch/issues/117641
-- class: "org.elasticsearch.xpack.esql.qa.mixed.MultiClusterEsqlSpecIT"
-  method: "test {scoring.*}"
-  issue: https://github.com/elastic/elasticsearch/issues/118460
-- class: "org.elasticsearch.xpack.esql.ccq.MultiClusterSpecIT"
-  method: "test {scoring.*}"
-  issue: https://github.com/elastic/elasticsearch/issues/117751
 - class: org.elasticsearch.search.ccs.CrossClusterIT
   method: testCancel
   issue: https://github.com/elastic/elasticsearch/issues/108061

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

@@ -104,7 +104,7 @@ public class CsvTestsDataLoader {
     private static final TestsDataset DISTANCES = new TestsDataset("distances");
     private static final TestsDataset K8S = new TestsDataset("k8s", "k8s-mappings.json", "k8s.csv").withSetting("k8s-settings.json");
     private static final TestsDataset ADDRESSES = new TestsDataset("addresses");
-    private static final TestsDataset BOOKS = new TestsDataset("books");
+    private static final TestsDataset BOOKS = new TestsDataset("books").withSetting("books-settings.json");
     private static final TestsDataset SEMANTIC_TEXT = new TestsDataset("semantic_text").withInferenceEndpoint(true);
 
     public static final Map<String, TestsDataset> CSV_DATASET_MAP = Map.ofEntries(

x-pack/plugin/esql/qa/testFixtures/src/main/resources/books-settings.json

@@ -0,0 +1,5 @@
+{
+  "index": {
+    "number_of_shards": 3
+  }
+}