Unable to destroy/expunge systemvm in a multihypervisor cluster/environment

### problem

Unable to destroy/expunge systemvm in a multihypervisor cluster/environment

### versions

ACS 4.22

### The steps to reproduce the bug

1. Create a Cloudstack environment with 2 clusters ( vmware , KVM)

2. Launch systemvm's on the vmware cluster, make sure they are in running state

3. Shutdown the vmware vcenter cluster , the system vm's will be running state , but the agent will be in a disconnected state

4. Mark the zone is disabled and try to stop or destroy the systemvm's

5. Exception observed

Logs

```

2025-12-15 05:08:35,162 DEBUG [c.c.a.m.ClusteredAgentManagerImpl] (API-Job-Executor-13:[ctx-a07f634d, job-151, ctx-1f1a2c2e]) (logid:2a920452) Wait time setting on org.apache.cloudstack.storage.command.DeleteCommand is 1800 seconds
2025-12-15 05:08:35,162 DEBUG [o.a.c.s.RemoteHostEndPoint] (API-Job-Executor-13:[ctx-a07f634d, job-151, ctx-1f1a2c2e]) (logid:2a920452) Failed to send command, due to Agent:1, com.cloud.exception.AgentUnavailableException: Resource [Host:1] is unreachable: Host 1: Host with specified id is not in the right state: Disconnected
2025-12-15 05:08:35,162 DEBUG [o.a.c.s.RemoteHostEndPoint] (API-Job-Executor-14:[ctx-63c6fb05, job-152, ctx-8ae693e9]) (logid:cb1a3aae) Failed to send command, due to Agent:1, com.cloud.exception.AgentUnavailableException: Resource [Host:1] is unreachable: Host 1: Host with specified id is not in the right state: Disconnected
2025-12-15 05:08:35,162 DEBUG [o.a.c.s.d.d.CloudStackPrimaryDataStoreDriverImpl] (API-Job-Executor-13:[ctx-a07f634d, job-151, ctx-1f1a2c2e]) (logid:2a920452) Unable to destroy volume [id: 9, uuid: 5113804b-2cd3-42ce-b76f-bdfa97885503] com.cloud.utils.exception.CloudRuntimeException: Failed to send command, due to Agent:1, com.cloud.exception.AgentUnavailableException: Resource [Host:1] is unreachable: Host 1: Host with specified id is not in the right state: Disconnected
at org.apache.cloudstack.storage.RemoteHostEndPoint.sendMessage(RemoteHostEndPoint.java:141)
at org.apache.cloudstack.storage.datastore.driver.CloudStackPrimaryDataStoreDriverImpl.deleteAsync(CloudStackPrimaryDataStoreDriverImpl.java:259)
at org.apache.cloudstack.storage.volume.VolumeServiceImpl.expungeVolumeAsync(VolumeServiceImpl.java:444)
at org.apache.cloudstack.engine.orchestration.VolumeOrchestrator.cleanupVolumes(VolumeOrchestrator.java:1355)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)

```

Tried reducing the value of the expunge.delay and expunge.interval

Workaround

Manually update the database and set the removed date

mysql>update vm_instance set removed=now() where id=<>;

### What to do about it?

In order to deploy the systemvm's on the kvm cluster end user has to update the database

Provide an option to force remove the systemvm which are struck in expunging state or introduce a zone level setting which can specify the cluster for the systemvm deployment

首先以断开连接的代理日志为入口，沿着 RemoteHostEndPoint.java、CloudStackPrimaryDataStoreDriverImpl.java、VolumeServiceImpl.java 和 VolumeOrchestrator.java 追踪故障。复现双集群 VMware/KVM 场景，并检查 destroy 和 expunge 路径。当无需手动更新 vm_instance 即可移除或 expunge system VMs，从而能够在 KVM 集群上部署时，即表示完成。

由索引模型根据 Issue 内容生成。