Handle missing model in CLI parameters for llama-run (#11399)
The HTTP client in llama-run only prints an error in case the download of
a resource failed. If the model name in the CLI parameter list is missing,
this causes the application to crash.
In order to prevent this, a check for the required model parameter has been
added and errors for resource downloads get propagated to the caller.
Signed-off-by: Michael Engel <mengel@redhat.com>
