**Build scan:**
https://gradle-enterprise.elastic.co/s/xvwrlxusnxdgu/tests/:qa:rolling-upgrade:v8.6.1%23oneThirdUpgradedTest/org.elasticsearch.upgrades.SnapshotBasedRecoveryIT/testSnapshotBasedRecovery

**Reproduction line:**
```
./gradlew ':qa:rolling-upgrade:v8.6.1#oneThirdUpgradedTest' -Dtests.class="org.elasticsearch.upgrades.SnapshotBasedRecoveryIT" -Dtests.method="testSnapshotBasedRecovery" -Dtests.seed=32151106DB58AD22 -Dtests.bwc=true -Dtests.locale=en-MT -Dtests.timezone=Asia/Colombo -Druntime.java=17
```

**Applicable branches:**
main

**Reproduces locally?:**
Didn't try

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.upgrades.SnapshotBasedRecoveryIT&tests.test=testSnapshotBasedRecovery

**Failure excerpt:**
```
java.lang.AssertionError: timed out waiting for green state for index [snapshot_based_recovery] cluster state [{
  "cluster_name" : "v8.6.1",
  "cluster_uuid" : "ETWjuovuQXC6pr6CN8pJXA",
  "version" : 391,
  "state_uuid" : "y7ss0aZLQvab9JIDk7jppg",
  "master_node" : "tsyOGVI1T5iBSTLS0zL29A",
  ...
```
server/src/main/java/org/elasticsearch/cluster/routing/allocation/allocator/DesiredBalanceComputer.java
}
        final var unassignedReplicaIterator = routingNodes.unassigned().iterator();
        while (unassignedReplicaIterator.hasNext()) {
            final var shardRouting = unassignedReplicaIterator.next();
            if (unassignedPrimaries.contains(shardRouting.shardId()) == false) {
                final var nodeIds = unassignedShardsToInitialize.get(shardRouting);
                if (nodeIds != null && nodeIds.isEmpty() == false) {
                    final var nodeId = nodeIds.removeFirst();
                    final var routingNode = routingNodes.node(nodeId);
                    if (routingNode != null
                        && routingAllocation.deciders()
                            .canAllocate(shardRouting, routingNode, routingAllocation)
                            .type() != Decision.Type.NO) {
                        final var shardToInitialize = unassignedReplicaIterator.initialize(nodeId, null, 0L, changes);
                        clusterInfoSimulator.simulateShardStarted(shardToInitialize);
                        routingNodes.startShard(logger, shardToInitialize, changes, 0L);
                    }
                }
            }
        }
        List<MoveAllocationCommand> commands;
        while ((commands = pendingDesiredBalanceMoves.poll()) != null) {
            for (MoveAllocationCommand command : commands) {
                try {
                    command.execute(routingAllocation, false);
                } catch (RuntimeException e) {
                    logger.debug(
                        () -> "move shard ["
                            + command.index()
                            + ":"