volume was locked forever as "migration in progress"

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

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VolumeManagemet,Migration
~~~

##### CLOUDSTACK VERSION

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4.18.1
~~~

##### CONFIGURATION

##### KVM iscsi(GFS2,PCS)

##### SUMMARY

##### STEPS TO REPRODUCE

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VM migration with storage migration between different clusters
~~~

##### EXPECTED RESULTS

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VM runs on the destination KVM host
~~~

##### ACTUAL RESULTS

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During the migration process, the source host encountered a problem and went down. After that, the volume that was being migrated is permanently locked as "Migrating" and cannot be operated on.
When I looked inside the ISCSI volume mounted on the destination host, I was able to confirm that the migration was completed.

I tried rewriting the SQL table, but the problem did not improve.
I would like to file this issue as a bug that occurs in certain situations.
~~~

从 VolumeManagemet 和 Migration 组件开始，在源 KVM 主机发生故障的情况下，重现集群之间的 VM 存储迁移。跟踪目标确认完成后卷仍保持标记为 "Migrating" 的过程。完成的标准是无需手动重写 SQL 表即可恢复并运行该卷。

由索引模型根据 Issue 内容生成。