chore(deps): update dependency @embroider/test-setup to v4

Author: renovate[bot]

package.json

@@ -44,7 +44,7 @@
     "@commitlint/config-conventional": "^16.0.0",
     "@ember/optional-features": "^2.0.0",
     "@ember/test-helpers": "^2.6.0",
-    "@embroider/test-setup": "^0.50.2",
+    "@embroider/test-setup": "^4.0.0",
     "@glimmer/component": "^1.0.4",
     "@glimmer/tracking": "^1.0.4",
     "autoprefixer": "^10.4.2",