refactor: 💡 pull up loading and route action helper to core

ui/admin/package.json

@@ -61,12 +61,10 @@
     "ember-export-application-global": "^2.0.1",
     "ember-inline-svg": "^1.0.0",
     "ember-load-initializers": "^2.1.1",
-    "ember-loading": "^0.4.0",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-modifier": "^2.1.1",
     "ember-qunit": "^4.6.0",
     "ember-resolver": "^8.0.0",
-    "ember-route-action-helper": "^2.0.8",
     "ember-source": "~3.20.2",
     "ember-template-lint": "^2.14.0",
     "eslint": "^7.5.0",