JIMM: AllModels will always return the Type for models as IAAS #1930

Problem

https://github.com/canonical/jimm/blob/v3/internal/dbmodel/model.go#L140-L147

here we always return an empty model type.

However the Juju client if the model type is empty it will auto-fill IAAS.

See https://github.com/SimoneDutto/juju/blob/fix-new-client-client/api/controller/controller/controller.go#L47-L74

Solution

The solution might be to call the controller hosting the model to get the model type and merge the info we have in jimm's state with the one coming from the actual controller. Like we do for ListModels