Correct IndexType test for dense_vector with no index (#136208)

Fixes #136202

Author: romseygeek

server/src/test/java/org/elasticsearch/index/mapper/vectors/DenseVectorFieldMapperTests.java

@@ -34,7 +34,6 @@
 import org.elasticsearch.index.codec.vectors.diskbbq.ES920DiskBBQVectorsFormat;
 import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.DocumentParsingException;
-import org.elasticsearch.index.mapper.IndexType;
 import org.elasticsearch.index.mapper.LuceneDocument;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.MapperBuilderContext;
@@ -1466,7 +1465,7 @@ protected void assertSearchable(MappedFieldType fieldType) {
         if (indexed) {
             assertTrue(fieldType.indexType().hasVectors());
         } else {
-            assertThat(fieldType.indexType(), equalTo(IndexType.NONE));
+            assertTrue(fieldType.indexType().hasOnlyDocValues());
         }
         assertEquals(fieldType.isSearchable(), indexed);
     }