update the hkmeantest to account for allowing -1 when vectors are close to a centroid and we shouldn't assign them

Author: john-wagster

muted-tests.yml

@@ -666,9 +666,6 @@ tests:
 - class: org.elasticsearch.upgrades.MatchOnlyTextRollingUpgradeIT
   method: testIndexing {upgradedNodes=1}
   issue: https://github.com/elastic/elasticsearch/issues/135525
-- class: org.elasticsearch.index.codec.vectors.cluster.HierarchicalKMeansTests
-  method: testFewDifferentValues
-  issue: https://github.com/elastic/elasticsearch/issues/135538
 
 # Examples:
 #

server/src/test/java/org/elasticsearch/index/codec/vectors/cluster/HierarchicalKMeansTests.java

@@ -127,7 +127,7 @@ public void testFewDifferentValues() throws IOException {
             assertEquals(nVectors, soarAssignments.length);
             // verify no duplicates exist
             for (int i = 0; i < assignments.length; i++) {
-                assertTrue(soarAssignments[i] >= 0 && soarAssignments[i] < centroids.length);
+                assertTrue(soarAssignments[i] >= -1 && soarAssignments[i] < centroids.length);
                 assertNotEquals(assignments[i], soarAssignments[i]);
             }
         } else {