Avoid relocation in testHistoryUUIDIsGenerated (#32270)

If the `index_history_uuid` can be allocated to any testing node, the
rebalance allocation decider may relocate that index. If the index is
relocated from 5.x to 6.x, we might have two different history_uuids
because history_uuid is bootstrapped twice by two different 6.x nodes:
a replica and a relocating primary.

This change prevents `index_history_uuid` from relocating by allocating
that index to two nodes only.

Closes #31291

qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/RecoveryIT.java

@@ -49,7 +49,6 @@
  */
 public class RecoveryIT extends AbstractRollingTestCase {
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/31291")
     public void testHistoryUUIDIsGenerated() throws Exception {
         final String index = "index_history_uuid";
         if (CLUSTER_TYPE == ClusterType.OLD) {
@@ -60,7 +59,11 @@ public void testHistoryUUIDIsGenerated() throws Exception {
                 // then delayed allocation will kick in. When the node comes back, the master will search for a copy
                 // but the recovering copy will be seen as invalid and the cluster health won't return to GREEN
                 // before timing out
-                .put(INDEX_DELAYED_NODE_LEFT_TIMEOUT_SETTING.getKey(), "100ms");
+                .put(INDEX_DELAYED_NODE_LEFT_TIMEOUT_SETTING.getKey(), "100ms")
+                // if this index can be allocated to any testing nodes, the rebalance allocation decider may relocate
+                // this index. if the relocation from 5.x to 6.x, we will have two different history_uuids because
+                // history_uuid is bootstrapped twice by two different 6.x nodes: a replica and a relocating primary.
+                .put("index.routing.allocation.include._name", "*node-0,*node-1");
             createIndex(index, settings.build());
         } else if (CLUSTER_TYPE == ClusterType.UPGRADED) {
             ensureGreen(index);