Refactor upgrade ember 4 (#1501)

Upgrade Ember 4

Co-authored-by: Randall Morey <randall@randallmorey.com>
Co-authored-by: Zhihe Li <zhihe.li@hashicorp.com>

ui/admin/config/ember-cli-update.json

@@ -3,7 +3,7 @@
   "packages": [
     {
       "name": "ember-cli",
-      "version": "3.24.0",
+      "version": "4.4.1",
       "blueprints": [
         {
           "name": "app",