### Environment

* Dubbo version: 2.7.4.1

ConsistentHashLoadBalance 用到了 System.identityHashCode(invokers); 来判断 hash 值，从而判断是否有服务端的上下线操作。
而TagRouter的org.apache.dubbo.rpc.cluster.router.tag.TagRouter#filterUsingStaticTag方法中的 stream 操作会修改 invokers 的值，所以 ConsistentHashLoadBalance 受到了影响。
导致即使在服务端没有上下线操作的时候，一致性hash负载均衡算法每次都需要重新进行hash环的映射。
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package org.apache.dubbo.rpc.cluster.loadbalance;
import org.apache.dubbo.rpc.Invoker;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
@SuppressWarnings("rawtypes")