Unable to delete Secondary Storage

##### ISSUE TYPE

* Bug Report

##### CLOUDSTACK VERSION

~~~
4.19.1.0
~~~

##### OS / ENVIRONMENT

Oracle Linux 8

##### SUMMARY

I added second secstore to one zone, and some images and templates were copied to it automatically. Now I want to delete it and an error occurs. There is no any mechanism in Cloudstack for removing templates from specific secstore or forcibly deleting a secstore.
Of course I can modify some records in DB like in https://github.com/apache/cloudstack/issues/8540 https://github.com/apache/cloudstack/issues/7347 but it's not a solution

Templates on this secstore
Some of them are downloaded, some are not.

在 Oracle Linux 8 上使用 CloudStack 4.19.1.0，透過包含已複製範本和映像的區域，重現次要儲存刪除失敗。追蹤刪除行為以及回報的儲存體/範本狀態；完成標準是不需手動變更資料庫記錄即可移除次要儲存區。

由索引模型根據 Issue 內容生成。