Enable frozen string in vestigial app files

Partially addresses #47424.

app/presenters/ci/build_runner_presenter.rb

+# frozen_string_literal: true
+
 module Ci
   class BuildRunnerPresenter < SimpleDelegator
     def artifacts

app/serializers/project_mirror_serializer.rb

+# frozen_string_literal: true
+
 class ProjectMirrorSerializer < BaseSerializer
   entity ProjectMirrorEntity
 end

app/serializers/test_case_entity.rb

+# frozen_string_literal: true
+
 class TestCaseEntity < Grape::Entity
   expose :status
   expose :name

app/serializers/test_reports_comparer_entity.rb

+# frozen_string_literal: true
+
 class TestReportsComparerEntity < Grape::Entity
   expose :total_status, as: :status
 

app/serializers/test_reports_comparer_serializer.rb

+# frozen_string_literal: true
+
 class TestReportsComparerSerializer < BaseSerializer
   entity TestReportsComparerEntity
 end

app/serializers/test_suite_comparer_entity.rb

+# frozen_string_literal: true
+
 class TestSuiteComparerEntity < Grape::Entity
   expose :name
   expose :total_status, as: :status

app/services/projects/detect_repository_languages_service.rb

+# frozen_string_literal: true
+
 module Projects
   class DetectRepositoryLanguagesService < BaseService
     attr_reader :detected_repository_languages, :programming_languages

app/services/todos/destroy/base_service.rb

+# frozen_string_literal: true
+
 module Todos
   module Destroy
     class BaseService

app/services/todos/destroy/confidential_issue_service.rb

+# frozen_string_literal: true
+
 module Todos
   module Destroy
     class ConfidentialIssueService < ::Todos::Destroy::BaseService

app/services/todos/destroy/entity_leave_service.rb

+# frozen_string_literal: true
+
 module Todos
   module Destroy
     class EntityLeaveService < ::Todos::Destroy::BaseService

app/services/todos/destroy/group_private_service.rb

+# frozen_string_literal: true
+
 module Todos
   module Destroy
     class GroupPrivateService < ::Todos::Destroy::BaseService

app/services/todos/destroy/private_features_service.rb

+# frozen_string_literal: true
+
 module Todos
   module Destroy
     class PrivateFeaturesService < ::Todos::Destroy::BaseService

app/services/todos/destroy/project_private_service.rb

+# frozen_string_literal: true
+
 module Todos
   module Destroy
     class ProjectPrivateService < ::Todos::Destroy::BaseService

app/workers/detect_repository_languages_worker.rb

+# frozen_string_literal: true
+
 class DetectRepositoryLanguagesWorker
   include ApplicationWorker
   include ExceptionBacktrace

app/workers/todos_destroyer/confidential_issue_worker.rb

+# frozen_string_literal: true
+
 module TodosDestroyer
   class ConfidentialIssueWorker
     include ApplicationWorker

app/workers/todos_destroyer/entity_leave_worker.rb

+# frozen_string_literal: true
+
 module TodosDestroyer
   class EntityLeaveWorker
     include ApplicationWorker

app/workers/todos_destroyer/group_private_worker.rb

+# frozen_string_literal: true
+
 module TodosDestroyer
   class GroupPrivateWorker
     include ApplicationWorker

app/workers/todos_destroyer/private_features_worker.rb

+# frozen_string_literal: true
+
 module TodosDestroyer
   class PrivateFeaturesWorker
     include ApplicationWorker

app/workers/todos_destroyer/project_private_worker.rb

+# frozen_string_literal: true
+
 module TodosDestroyer
   class ProjectPrivateWorker
     include ApplicationWorker

changelogs/unreleased/frozen-string-enable-app-vestigial.yml

+---
+title: Enable frozen string in vestigial app files
+merge_request:
+author: gfyoung
+type: performance