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

```
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#### Potential References

Start by searching the existing issues for related CloudStack template requests, as the issue asks, and review the packer-plugin-cloudstack repository to locate template creation. Clarify the intended configuration and behavior for crosszone support before starting; done means templates can be copied automatically to newly created zones without CloudMonkey or the UI.

Written by the indexing model from the issue text.