Fix weight calculation of decideRebalance when explain (#17720)

Signed-off-by: gesong.samuel <[email protected]>

Author: HUSTERGS

Diff for: server/src/main/java/org/opensearch/cluster/routing/allocation/allocator/LocalShardsBalancer.java

@@ -233,7 +233,7 @@ MoveDecision decideRebalance(final ShardRouting shard) {
 
         // balance the shard, if a better node can be found
         final String idxName = shard.getIndexName();
-        final float currentWeight = weight.weight(this, currentNode, idxName);
+        final float currentWeight = weight.weightWithRebalanceConstraints(this, currentNode, idxName);
         final AllocationDeciders deciders = allocation.deciders();
         Decision.Type rebalanceDecisionType = Decision.Type.NO;
         BalancedShardsAllocator.ModelNode assignedNode = null;