Support download of template which are registered as Direct Download

##### ISSUE TYPE

* Improvement Request

##### COMPONENT NAME

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Component: template, kvm

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##### CLOUDSTACK VERSION

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4.18

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##### SUMMARY

Support download of template which are registered as Direct Download

Steps to reproduce the issue

1. Register a qcow2 template > select the Direct Download option

2. Launch a vm from the registered template

3. Try to download the template ( images> template> Download template

4. The download of template fails

Screenshot



Expected behavior
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Currently we are storing the direct downloaded templates in primary storage

Cloudstack supports the download of templates only if they are present in the seconday storage.

There could be use-case scenario if a user wants to download the original template which is registered as direct download

Comece rastreando o fluxo de trabalho de download de templates descrito na issue e compare como os templates no armazenamento primário são tratados em relação aos templates no armazenamento secundário. Reproduza a falha usando um template qcow2 registrado com Direct Download e, em seguida, verifique se o download do template original é concluído com sucesso sem quebrar o caminho existente de armazenamento secundário.

Escrita pelo modelo de indexação a partir do texto da issue.