build(deps-dev): bump ember-load-initializers in /app-frontend

Bumps [ember-load-initializers](https://github.com/ember-cli/ember-load-initializers) from 2.1.2 to 3.0.1.
- [Release notes](https://github.com/ember-cli/ember-load-initializers/releases)
- [Changelog](https://github.com/ember-cli/ember-load-initializers/blob/master/CHANGELOG.md)
- [Commits](ember-cli/ember-load-initializers@v2.1.2...v3.0.1)

---
updated-dependencies:
- dependency-name: ember-load-initializers
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>