Rudder

We display a "VM type" in the interface, but it is not accessible elsewhere. It is useful by groups by VM types for example.

Part of the problem is the naming consistency:

- in API, it is named provider under the machine field:

        "machine": {
          "id": "63a9f0ea-7bb9-8050-796b-649e85481845",
          "type": "Virtual",
          "provider": "qemu",
          "manufacturer": "QEMU" 
        },

- but in group, we only have manufacturer, not VM Type at all.