[8.15] Hide new test behind a feature (#112301) (#112317)

* Hide new test behind a feature (#112301)

(cherry picked from commit 0fe220a)

# Conflicts:
#	muted-tests.yml
#	server/src/main/java/org/elasticsearch/index/mapper/MapperFeatures.java

* Update MapperFeatures.java

Author: lkts

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/indices.create/20_synthetic_source.yml

@@ -1209,8 +1209,8 @@ nested object with stored array:
 # 112156
 stored field under object with store_array_source:
   - requires:
-      cluster_features: ["mapper.track_ignored_source"]
-      reason: requires tracking ignored source
+      cluster_features: ["mapper.source.synthetic_source_stored_fields_advance_fix"]
+      reason: requires bug fix to be implemented
 
   - do:
       indices.create:

server/src/main/java/org/elasticsearch/index/mapper/MapperFeatures.java

@@ -28,7 +28,8 @@ public Set<NodeFeature> getFeatures() {
             DenseVectorFieldMapper.INT4_QUANTIZATION,
             DenseVectorFieldMapper.BIT_VECTORS,
             DocumentMapper.INDEX_SORTING_ON_NESTED,
-            KeywordFieldMapper.KEYWORD_DIMENSION_IGNORE_ABOVE
+            KeywordFieldMapper.KEYWORD_DIMENSION_IGNORE_ABOVE,
+            SourceFieldMapper.SYNTHETIC_SOURCE_STORED_FIELDS_ADVANCE_FIX
         );
     }
 }

server/src/main/java/org/elasticsearch/index/mapper/SourceFieldMapper.java

@@ -38,6 +38,9 @@
 
 public class SourceFieldMapper extends MetadataFieldMapper {
     public static final NodeFeature SYNTHETIC_SOURCE_FALLBACK = new NodeFeature("mapper.source.synthetic_source_fallback");
+    public static final NodeFeature SYNTHETIC_SOURCE_STORED_FIELDS_ADVANCE_FIX = new NodeFeature(
+        "mapper.source.synthetic_source_stored_fields_advance_fix"
+    );
 
     public static final String NAME = "_source";
     public static final String RECOVERY_SOURCE_NAME = "_recovery_source";