CloudStack Template add crosszone support

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#### Description

Add crosszone support for cloudstack template creation

#### Use Case(s)

Having crosszone available would ensure template could be copied to any new zone automatically instead of user needing to know a new zone has been created. This would stop the need to use cloud monkey or ui to push template to new zone.

#### Potential configuration

```
```

#### Potential References

首先按照 issue 的要求，在现有 issue 中搜索相关的 CloudStack 模板请求，并查看 packer-plugin-cloudstack repository 以定位模板创建的位置。开始之前，明确 crosszone 支持所需的配置和行为；完成的标准是无需 CloudMonkey 或 UI，即可将模板自动复制到新创建的 zone。

由索引模型根据 Issue 内容生成。