Enable frozen string in apps/services/**/*.rb

For directories application_settings --> labels.

Partially addresses #47424.

app/services/application_settings/base_service.rb

+# frozen_string_literal: true
+
 module ApplicationSettings
   class BaseService < ::BaseService
     def initialize(application_setting, user, params = {})

app/services/application_settings/update_service.rb

+# frozen_string_literal: true
+
 module ApplicationSettings
   class UpdateService < ApplicationSettings::BaseService
     attr_reader :params, :application_setting

app/services/applications/create_service.rb

+# frozen_string_literal: true
+
 module Applications
   class CreateService
     def initialize(current_user, params)

app/services/auth/container_registry_authentication_service.rb

+# frozen_string_literal: true
+
 module Auth
   class ContainerRegistryAuthenticationService < BaseService
     AUDIENCE = 'container_registry'.freeze

app/services/badges/base_service.rb

+# frozen_string_literal: true
+
 module Badges
   class BaseService
     protected

app/services/badges/build_service.rb

+# frozen_string_literal: true
+
 module Badges
   class BuildService < Badges::BaseService
     # returns the created badge

app/services/badges/create_service.rb

+# frozen_string_literal: true
+
 module Badges
   class CreateService < Badges::BaseService
     # returns the created badge

app/services/badges/update_service.rb

+# frozen_string_literal: true
+
 module Badges
   class UpdateService < Badges::BaseService
     # returns the updated badge

app/services/boards/base_service.rb

+# frozen_string_literal: true
+
 module Boards
   class BaseService < ::BaseService
     # Parent can either a group or a project

app/services/boards/create_service.rb

+# frozen_string_literal: true
+
 module Boards
   class CreateService < Boards::BaseService
     def execute

app/services/boards/issues/create_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Issues
     class CreateService < Boards::BaseService

app/services/boards/issues/list_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Issues
     class ListService < Boards::BaseService

app/services/boards/issues/move_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Issues
     class MoveService < Boards::BaseService

app/services/boards/list_service.rb

+# frozen_string_literal: true
+
 module Boards
   class ListService < Boards::BaseService
     def execute

app/services/boards/lists/create_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Lists
     class CreateService < Boards::BaseService

app/services/boards/lists/destroy_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Lists
     class DestroyService < Boards::BaseService

app/services/boards/lists/generate_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Lists
     class GenerateService < Boards::BaseService

app/services/boards/lists/list_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Lists
     class ListService < Boards::BaseService

app/services/boards/lists/move_service.rb

+# frozen_string_literal: true
+
 module Boards
   module Lists
     class MoveService < Boards::BaseService

app/services/chat_names/authorize_user_service.rb

+# frozen_string_literal: true
+
 module ChatNames
   class AuthorizeUserService
     include Gitlab::Routing