volume was locked forever as "migration in progress"

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

~~~
VolumeManagemet,Migration
~~~

##### CLOUDSTACK VERSION

~~~
4.18.1
~~~

##### CONFIGURATION

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

##### SUMMARY

##### STEPS TO REPRODUCE

~~~
VM migration with storage migration between different clusters
~~~

##### EXPECTED RESULTS

~~~
VM runs on the destination KVM host
~~~

##### ACTUAL RESULTS

~~~
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.
~~~

從 VolumeManagemet 和 Migration 元件開始，在來源 KVM 主機發生故障的情況下，重現叢集之間的 VM 儲存體移轉。追蹤目的地確認完成後，磁碟區仍保持標記為 "Migrating" 的情況。完成的標準是無需手動重寫 SQL 資料表即可復原並操作該磁碟區。

由索引模型根據 Issue 內容生成。