Fix the issue that error message still shows up after swithed to another cloud provider

https://github.com/rancher/rancher/issues/10855

lib/global-admin/addon/clusters/new/cloud/controller.js

@@ -1,5 +1,4 @@
 import Controller from '@ember/controller';
-import { inject as service } from '@ember/service';
 import { alias } from '@ember/object/computed';
 import NewOrEdit from 'ui/mixins/new-or-edit';
 import { set, computed } from '@ember/object';
@@ -11,6 +10,7 @@ export default Controller.extend(NewOrEdit, {
 
   actions: {
     switchDriver(name) {
+      set(this, 'errors', []);
       set(this, 'driver', name);
     },