Add support for custom Meta-Data (aka properties) in Cloud Template

### What feature do you want to see added?

We need to set 'Meta-Data' properties when creating cloud machines, (--property option when doing a server create command)
It seems the current template options do not expose this option.

Could it be possible to add a list of properties passed to the server when it's created ? (simple list of key-value)

### Upstream changes

_No response_

### Are you interested in contributing this feature?

_No response_