Coverage improvement round-out following up previous work (#23987)

.rubocop_todo.yml

spec/controllers/activitypub/claims_controller_spec.rb

spec/controllers/api/v2/instances_controller_spec.rb

spec/controllers/api/v2/suggestions_controller_spec.rb

spec/controllers/auth/setup_controller_spec.rb

spec/controllers/custom_css_controller_spec.rb

spec/controllers/filters/statuses_controller_spec.rb

spec/controllers/filters_controller_spec.rb

spec/controllers/health_controller_spec.rb

spec/controllers/privacy_controller_spec.rb

spec/helpers/statuses_helper_spec.rb

spec/lib/importer/base_importer_spec.rb

spec/lib/search_query_transformer_spec.rb

spec/models/admin/appeal_filter_spec.rb

spec/models/form/admin_settings_spec.rb

spec/models/form/status_filter_batch_action_spec.rb

spec/workers/verify_account_links_worker_spec.rb