Enable frozen string in app/graphql + app/finders

Partially addresses #47424.

app/finders/labels_finder.rb

+# frozen_string_literal: true
+
 class LabelsFinder < UnionFinder
   prepend FinderWithCrossProjectAccess
   include FinderMethods

app/finders/license_template_finder.rb

+# frozen_string_literal: true
+
 # LicenseTemplateFinder
 #
 # Used to find license templates, which may come from a variety of external

app/finders/members_finder.rb

+# frozen_string_literal: true
+
 class MembersFinder
   attr_reader :project, :current_user, :group

app/finders/merge_request_target_project_finder.rb

+# frozen_string_literal: true
+
 class MergeRequestTargetProjectFinder
   include FinderMethods

app/finders/merge_requests_finder.rb

+# frozen_string_literal: true
+
 # Finders::MergeRequest class
 #
 # Used to filter MergeRequests collections by set of params

app/finders/milestones_finder.rb

+# frozen_string_literal: true
+
 # Search for milestones
 #
 # params - Hash

app/finders/notes_finder.rb

+# frozen_string_literal: true
+
 class NotesFinder
   FETCH_OVERLAP = 5.seconds

app/finders/personal_access_tokens_finder.rb

+# frozen_string_literal: true
+
 class PersonalAccessTokensFinder
   attr_accessor :params

app/finders/personal_projects_finder.rb

+# frozen_string_literal: true
+
 class PersonalProjectsFinder < UnionFinder
   include Gitlab::Allowable

app/finders/pipeline_schedules_finder.rb

+# frozen_string_literal: true
+
 class PipelineSchedulesFinder
   attr_reader :project, :pipeline_schedules

app/finders/pipelines_finder.rb

+# frozen_string_literal: true
+
 class PipelinesFinder
   attr_reader :project, :pipelines, :params, :current_user

app/finders/projects_finder.rb

+# frozen_string_literal: true
+
 # ProjectsFinder
 #
 # Used to filter Projects  by set of params

app/finders/runner_jobs_finder.rb

+# frozen_string_literal: true
+
 class RunnerJobsFinder
   attr_reader :runner, :params

app/finders/snippets_finder.rb

+# frozen_string_literal: true
+
 # Snippets Finder
 #
 # Used to filter Snippets collections by a set of params

app/finders/tags_finder.rb

+# frozen_string_literal: true
+
 class TagsFinder
   def initialize(repository, params)
     @repository = repository

app/finders/template_finder.rb

+# frozen_string_literal: true
+
 class TemplateFinder
   VENDORED_TEMPLATES = {
     dockerfiles: ::Gitlab::Template::DockerfileTemplate,

app/finders/todos_finder.rb

+# frozen_string_literal: true
+
 # TodosFinder
 #
 # Used to filter Todos by set of params

app/finders/union_finder.rb

+# frozen_string_literal: true
+
 class UnionFinder
   def find_union(segments, klass)
     if segments.length > 1

app/finders/user_recent_events_finder.rb

+# frozen_string_literal: true
+
 # Get user activity feed for projects common for a user and a logged in user
 #
 # - current_user: The user viewing the events

app/finders/users_finder.rb

+# frozen_string_literal: true
+
 # UsersFinder
 #
 # Used to filter users by set of params