cli: Deprecate --cpu host

While the shorthand saves a tiny bit of typing, it is confusing
to people coming from QEMU, where -cpu host is the equivalent
of our --cpu host-passthrough. It's better to stick with the
unambiguous names used by libvirt.

Besides, the GUI already uses "host-model" throughout, so
advocating its use in the CLI too increases the internal
consistency.

https://issues.redhat.com/browse/RHEL-40003

Signed-off-by: Andrea Bolognani <[email protected]>

virtinst/cli.py

@@ -2338,6 +2338,7 @@ def bandwidth_find_inst_cb(self, *args, **kwargs):
 
     def set_model_cb(self, inst, val, virtarg):
         if val == "host":
+            log.warning(_("CPU model=host is deprecated, use model=host-model"))
             val = inst.SPECIAL_MODE_HOST_MODEL
         if val == "none":
             val = inst.SPECIAL_MODE_CLEAR