build(deps-dev): Bump @ember/test-helpers from 4.0.4 to 5.0.0 (#1918)

Bumps [@ember/test-helpers](https://github.com/emberjs/ember-test-helpers) from 4.0.4 to 5.0.0.
- [Release notes](https://github.com/emberjs/ember-test-helpers/releases)
- [Changelog](https://github.com/emberjs/ember-test-helpers/blob/master/CHANGELOG.md)
- [Commits](https://github.com/emberjs/ember-test-helpers/commits)

---
updated-dependencies:
- dependency-name: "@ember/test-helpers"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

test-app/package.json

@@ -34,7 +34,7 @@
     "@babel/plugin-proposal-decorators": "^7.25.9",
     "@ember/optional-features": "^2.2.0",
     "@ember/string": "^3.1.1",
-    "@ember/test-helpers": "^4.0.4",
+    "@ember/test-helpers": "^5.0.0",
     "@embroider/compat": "^3.8.0",
     "@embroider/core": "^3.5.0",
     "@embroider/macros": "^1.16.10",