Update dependency @ember/test-helpers to v5

Author: renovate[bot]

package.json

@@ -41,7 +41,7 @@
     "@babel/plugin-proposal-decorators": "^7.21.0",
     "@ember/optional-features": "2.2.0",
     "@ember/string": "^3.0.1",
-    "@ember/test-helpers": "2.9.6",
+    "@ember/test-helpers": "5.3.0",
     "@embroider/test-setup": "1.8.3",
     "@glimmer/component": "1.1.2",
     "@glimmer/tracking": "1.1.2",