Migrate error tracking settings tests from Karma to Jest
The following frontend tests should be migrated to Jest (&895 (closed)):
$ find spec/javascripts/error_tracking_settings/components
spec/javascripts/error_tracking_settings/components
spec/javascripts/error_tracking_settings/components/app_spec.js
spec/javascripts/error_tracking_settings/components/project_dropdown_spec.js
spec/javascripts/error_tracking_settings/components/error_tracking_form_spec.js