Migrating VM instances fails using arm64 hosts

### problem

Migrating systemvms (CPVM/SSVM) from arm64 local-storage based host throws this error using 4.22/RC3:

```
2025-11-02 00:24:01,001 DEBUG [c.c.a.t.Request] (AgentManager-Handler-1:[]) (logid:) Seq 233-8103101629546364942: Processing: { Ans: , MgmtId: 104339268210986, via: 233, Ver: v1, Flags: 110, [{"com.cloud.agent.api.Answer":{"result":"false","details":"com.cloud.utils.exception.CloudRuntimeException: Could not fetch storage pool 63229d40-f348-4636-8707-74ab46ab28d0 from libvirt due to org.libvirt.LibvirtException: Storage pool not found: no storage pool with matching uuid '63229d40-f348-4636-8707-74ab46ab28d0'
at com.cloud.hypervisor.kvm.storage.KVMStoragePoolManager.getStoragePool(KVMStoragePoolManager.java:286)
at com.cloud.hypervisor.kvm.storage.KVMStoragePoolManager.getStoragePool(KVMStoragePoolManager.java:272)
at com.cloud.hypervisor.kvm.storage.KVMStoragePoolManager.disconnectPhysicalDisksViaVmSpec(KVMStoragePoolManager.java:247)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtPrepareForMigrationCommandWrapper.handleRollback(LibvirtPrepareForMigrationCommandWrapper.java:160)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtPrepareForMigrationCommandWrapper.execute(LibvirtPrepareForMigrationCommandWrapper.java:59)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtPrepareForMigrationCommandWrapper.execute(LibvirtPrepareForMigrationCommandWrapper.java:50)
at com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78)
at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:2280)
at com.cloud.agent.Agent.processRequest(Agent.java:813)
at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:1295)
at com.cloud.utils.nio.Task.call(Task.java:83)
at com.cloud.utils.nio.Task.call(Task.java:29)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
","wait":"0","bypassHostMaintenance":"false"}}] }

```

Later also causes NPE:
```
2025-11-02 00:24:03,278 INFO [o.a.c.s.m.KvmNonManagedStorageDataMotionStrategy] (Work-Job-Executor-19:[ctx-b7d81f9a, job-15822/job-15823, ctx-a65e4c89]) (logid:95b78c81) Expunging dest volume [id: 1547, state: Ready] as part of failed VM migration with volumes command for VM [1161].
2025-11-02 00:24:03,279 DEBUG [o.a.c.s.v.VolumeServiceImpl] (Work-Job-Executor-19:[ctx-b7d81f9a, job-15822/job-15823, ctx-a65e4c89]) (logid:95b78c81) Failed to copy volume java.lang.NullPointerException: Cannot invoke "com.cloud.storage.VolumeVO.getId()" because "this.volumeVO" is null
at org.apache.cloudstack.storage.volume.VolumeObject.stateTransit(VolumeObject.java:243)
at org.apache.cloudstack.storage.volume.VolumeObject.processEvent(VolumeObject.java:413)
at org.apache.cloudstack.storage.motion.StorageSystemDataMotionStrategy.copyAsync(StorageSystemDataMotionStrategy.java:2199)
at org.apache.cloudstack.storage.motion.DataMotionServiceImpl.copyAsync(DataMotionServiceImpl.java:136)
at org.apache.cloudstack.storage.volume.VolumeServiceImpl.migrateVolumes(VolumeServiceImpl.java:2356)
at org.apache.cloudstack.engine.orchestration.VolumeOrchestrator.migrateVolumes(VolumeOrchestrator.java:1514)
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)
```

```
2025-11-02 00:24:03,364 ERROR [c.c.v.VmWorkJobDispatcher] (Work-Job-Executor-19:[ctx-b7d81f9a, job-15822/job-15823]) (logid:95b78c81) Unable to complete AsyncJob {"accountId":2,"cmd":"com.cloud.vm.VmWorkMigrateWithStorage","cmdInfo":"rO0ABXNyACVjb20uY2xvdWQudm0uVm1Xb3JrTWlncmF0ZVdpdGhTdG9yYWdlsew9z6UxtXMCAANKAApkZXN0SG9zdElkSgAJc3JjSG9zdElkTAAMdm9sdW1lVG9Qb29sdAAPTGphdmEvdXRpbC9NYXA7eHIAE2NvbS5jbG91ZC52bS5WbVdvcmufmbZW8CVnawIABEoACWFjY291bnRJZEoABnVzZXJJZEoABHZtSWRMAAtoYW5kbGVyTmFtZXQAEkxqYXZhL2xhbmcvU3RyaW5nO3hwAAAAAAAAAAIAAAAAAAAAAgAAAAAAAASJdAAZVmlydHVhbE1hY2hpbmVNYW5hZ2VySW1wbAAAAAAAAADpAAAAAAAAALNzcgARamF2YS51dGlsLkhhc2hNYXAFB9rBwxZg0QMAAkYACmxvYWRGYWN0b3JJAAl0aHJlc2hvbGR4cD9AAAAAAAAAdwgAAAAQAAAAAHg","cmdVersion":0,"completeMsid":null,"created":"Sun Nov 02 00:23:46 IST 2025","id":15823,"initMsid":104339268210986,"instanceId":null,"instanceType":null,"lastPolled":null,"lastUpdated":null,"processStatus":0,"removed":null,"result":null,"resultCode":0,"status":"IN_PROGRESS","userId":2,"uuid":"f4950b59-4f53-47dc-856a-5abda1a15964"}, job origin: 15822 com.cloud.utils.exception.CloudRuntimeException: Failed to migrate VM [VM instance {"id":1161,"instanceName":"s-1161-VM","state":"Migrating","type":"SecondaryStorageVm","uuid":"ff0368d4-e71c-4e49-ad70-c7dab8ef7ea9"}] along with its volumes due to [java.lang.NullPointerException: Cannot invoke "com.cloud.storage.VolumeVO.getId()" because "this.volumeVO" is null].
at org.apache.cloudstack.engine.orchestration.VolumeOrchestrator.migrateVolumes(VolumeOrchestrator.java:1520)
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)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)

```

On the target host, this exists:
```
root@cloudpi:/home/rohit# virsh pool-dumpxml cc155507-f2ba-4a96-a9b9-2dac9dc50a24

cc155507-f2ba-4a96-a9b9-2dac9dc50a24
cc155507-f2ba-4a96-a9b9-2dac9dc50a24
1969186340864
1526301487104
442884853760



/var/lib/libvirt/images

0711
0
0

```

On the source host, this exists:
```
root@kvmpi:/home/rohit# virsh pool-dumpxml 63229d40-f348-4636-8707-74ab46ab28d0

63229d40-f348-4636-8707-74ab46ab28d0
63229d40-f348-4636-8707-74ab46ab28d0
1969186340864
939565473792
1029620867072



/var/lib/libvirt/images

0711
0
0

```

In ACS DB: storage pool are defined (source is pikvm, dest is cloudpi)
```
*************************** 2. row ***************************
id: 44
name: local-pikvm-arm64
uuid: 63229d40-f348-4636-8707-74ab46ab28d0
pool_type: Filesystem
port: 0
data_center_id: 1
pod_id: 1
cluster_id: 13
used_bytes: 939565735936
capacity_bytes: 1969186340864
host_address: 10.10.1.10
user_info: NULL
path: /var/lib/libvirt/images
created: 2024-07-29 15:40:15
removed: NULL
update_time: 2025-11-01 19:00:44
status: Up
storage_provider_name: DefaultPrimary
scope: HOST
hypervisor: KVM
managed: 0
capacity_iops: NULL
parent: 0
used_iops: 24
*************************** 3. row ***************************
id: 47
name: local-cloudpi-arm64
uuid: cc155507-f2ba-4a96-a9b9-2dac9dc50a24
pool_type: Filesystem
port: 0
data_center_id: 1
pod_id: 1
cluster_id: 13
used_bytes: 1527497064448
capacity_bytes: 1969186340864
host_address: 10.10.1.5
user_info: NULL
path: /var/lib/libvirt/images
created: 2025-08-10 11:13:27
removed: NULL
update_time: 2025-11-01 19:06:01
status: Up
storage_provider_name: DefaultPrimary
scope: HOST
hypervisor: KVM
managed: 0
capacity_iops: NULL
parent: 0
used_iops: 49

```

### versions

ACS 4.22 RC3, adv zone, arm64+x86 mix host env. Preferred arch set to arm64.

### The steps to reproduce the bug

See description above

### What to do about it?

Ideally the local storage pool of the target host should be used in the domain/xml