Enable frozen string in apps/uploaders/*.rb

Partially addresses #47424.

app/services/access_token_validation_service.rb

+# frozen_string_literal: true
+
 class AccessTokenValidationService
   # Results:
   VALID = :valid

app/services/after_branch_delete_service.rb

+# frozen_string_literal: true
+
 ##
 # Branch can be deleted either by DeleteBranchService
 # or by GitPushService.

app/services/akismet_service.rb

+# frozen_string_literal: true
+
 class AkismetService
   attr_accessor :owner, :text, :options

app/services/audit_event_service.rb

+# frozen_string_literal: true
+
 class AuditEventService
   def initialize(author, entity, details = {})
     @author, @entity, @details = author, entity, details

app/services/base_count_service.rb

+# frozen_string_literal: true
+
 # Base class for services that count a single resource such as the number of
 # issues for a project.
 class BaseCountService

app/services/base_renderer.rb

+# frozen_string_literal: true
+
 class BaseRenderer
   attr_reader :current_user

app/services/base_service.rb

+# frozen_string_literal: true
+
 class BaseService
   include Gitlab::Allowable

app/services/cohorts_service.rb

+# frozen_string_literal: true
+
 class CohortsService
   MONTHS_INCLUDED = 12

app/services/compare_service.rb

+# frozen_string_literal: true
+
 require 'securerandom'
 # Compare 2 refs for one repo or between repositories

app/services/create_branch_service.rb

+# frozen_string_literal: true
+
 class CreateBranchService < BaseService
   def execute(branch_name, ref)
     create_master_branch if project.empty_repo?

app/services/create_deployment_service.rb

+# frozen_string_literal: true
+
 class CreateDeploymentService
   attr_reader :job

app/services/create_release_service.rb

+# frozen_string_literal: true
+
 class CreateReleaseService < BaseService
   def execute(tag_name, release_description)
     repository = project.repository

app/services/create_snippet_service.rb

+# frozen_string_literal: true
+
 class CreateSnippetService < BaseService
   include SpamCheckService

app/services/delete_branch_service.rb

+# frozen_string_literal: true
+
 class DeleteBranchService < BaseService
   def execute(branch_name)
     repository = project.repository

app/services/delete_merged_branches_service.rb

+# frozen_string_literal: true
+
 class DeleteMergedBranchesService < BaseService
   def async_execute
     DeleteMergedBranchesWorker.perform_async(project.id, current_user.id)

app/services/event_create_service.rb

+# frozen_string_literal: true
+
 # EventCreateService class
 #
 # Used for creating events feed on dashboard after certain user action

app/services/git_push_service.rb

+# frozen_string_literal: true
+
 class GitPushService < BaseService
   attr_accessor :push_data, :push_commits
   include Gitlab::Access

app/services/git_tag_push_service.rb

+# frozen_string_literal: true
+
 class GitTagPushService < BaseService
   attr_accessor :push_data

app/services/gravatar_service.rb

+# frozen_string_literal: true
+
 class GravatarService
   def execute(email, size = nil, scale = 2, username: nil)
     return unless Gitlab::CurrentSettings.gravatar_enabled?

app/services/ham_service.rb

+# frozen_string_literal: true
+
 class HamService
   attr_accessor :spam_log