nmcli: improve the warning message about no controller found

When nmcli tries to match a controller it filters by its type. The
controller's type must match with the port's port-type. If no controller
matches, the printed warning was "doesn't refer to any existing
profile". However, the profile might exist, but with wrong type. Improve
the message so it makes that clear.

Fixes: aa12bb353b ('cli: discover slave type for a connection with a master')

src/nmcli/connections.c

@@ -4005,8 +4005,10 @@ normalized_controller_for_port(const GPtrArray *connections,
     }
 
     if (!out_controller) {
-        nmc_printerr(_("Warning: controller='%s' doesn't refer to any existing profile.\n"),
-                     controller);
+        nmc_printerr(
+            _("Warning: controller '%s' doesn't refer to any existing profile of type '%s'.\n"),
+            controller,
+            type);
         out_controller = controller;
         if (out_type)
             *out_type = type;