chore: 🤖 update @ember/test-helpers to 5.2.1 (#2797)

addons/core/package.json

@@ -42,7 +42,7 @@
     "ember-cli-sass": "^11.0.1",
     "ember-concurrency": "^4.0.3",
     "ember-feature-flags": "^6.0.0",
-    "ember-intl": "^7.0.7",
+    "ember-intl": "^7.1.8",
     "ember-loading": "^2.0.0",
     "ember-truth-helpers": "^4.0.3",
     "filesize": "^10.0.7",
@@ -53,7 +53,7 @@
     "@babel/eslint-parser": "^7.25.1",
     "@babel/plugin-proposal-decorators": "^7.24.7",
     "@ember/optional-features": "^2.1.0",
-    "@ember/test-helpers": "^4.0.5",
+    "@ember/test-helpers": "^5.2.1",
     "@embroider/test-setup": "^4.0.0",
     "@faker-js/faker": "^8.0.2",
     "@glimmer/component": "^1.1.2",