Icu 6657 auth method model fragments refactor (#1507)

* refactor: 💡 Remove fragment usage for arrays in auth method
* chore: 🤖 Remove ember-data-model-fragments

✅ Closes: ICU-6657

addons/api/package.json

@@ -31,8 +31,8 @@
     "ember-cli-babel": "^7.26.10",
     "ember-cli-htmlbars": "^6.1.0",
     "ember-cli-mirage": "^2.2.0",
+    "ember-copy": "^2.0.1",
     "ember-data": "^3.20.0",
-    "ember-data-model-fragments": "5.0.0-beta.2",
     "ember-fetch": "^8.1.1"
   },
   "devDependencies": {
@@ -50,7 +50,6 @@
     "ember-cli-inject-live-reload": "^2.1.0",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-terser": "^4.0.2",
-    "ember-copy": "^2.0.1",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.1",
     "ember-load-initializers": "^2.1.2",