Enable frozen string for spec/finders

Partially addresses:

https://gitlab.com/gitlab-org/gitlab/issues/27703

spec/dependencies/omniauth_saml_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'omniauth/strategies/saml'
 

spec/features/projects/jobs_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'tempfile'
 
@@ -424,8 +426,8 @@ describe 'Jobs', :clean_gitlab_redis_shared_state do
         it 'loads job trace' do
           expect(page).to have_content 'BUILD TRACE'
 
-          job.trace.write('a+b') do |stream|
-            stream.append(' and more trace', 11)
+          job.trace.write(+'a+b') do |stream|
+            stream.append(+' and more trace', 11)
           end
 
           expect(page).to have_content 'BUILD TRACE and more trace'

spec/finders/access_requests_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe AccessRequestsFinder do

spec/finders/admin/projects_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Admin::ProjectsFinder do

spec/finders/autocomplete/move_to_project_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Autocomplete::MoveToProjectFinder do

spec/finders/autocomplete/users_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Autocomplete::UsersFinder do

spec/finders/branches_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe BranchesFinder do

spec/finders/clusters_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ClustersFinder do

spec/finders/concerns/finder_methods_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe FinderMethods do

spec/finders/concerns/finder_with_cross_project_access_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe FinderWithCrossProjectAccess do

spec/finders/contributed_projects_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ContributedProjectsFinder do

spec/finders/environments_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe EnvironmentsFinder do

spec/finders/events_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe EventsFinder do

spec/finders/fork_projects_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ForkProjectsFinder do

spec/finders/group_descendants_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GroupDescendantsFinder do

spec/finders/group_members_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GroupMembersFinder, '#execute' do

spec/finders/group_projects_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GroupProjectsFinder do

spec/finders/groups_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GroupsFinder do

spec/finders/issues_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe IssuesFinder do

spec/finders/joined_groups_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe JoinedGroupsFinder do

spec/finders/labels_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe LabelsFinder do

spec/finders/license_template_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe LicenseTemplateFinder do

spec/finders/members_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MembersFinder, '#execute' do

spec/finders/merge_request_target_project_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MergeRequestTargetProjectFinder do

spec/finders/merge_requests_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MergeRequestsFinder do

spec/finders/milestones_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MilestonesFinder do

spec/finders/notes_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe NotesFinder do

spec/finders/personal_access_tokens_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PersonalAccessTokensFinder do

spec/finders/personal_projects_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PersonalProjectsFinder do

spec/finders/pipeline_schedules_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PipelineSchedulesFinder do

spec/finders/pipelines_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PipelinesFinder do

spec/finders/projects_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ProjectsFinder do

spec/finders/runner_jobs_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe RunnerJobsFinder do

spec/finders/snippets_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SnippetsFinder do

spec/finders/tags_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe TagsFinder do

spec/finders/template_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe TemplateFinder do

spec/finders/todos_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe TodosFinder do

spec/finders/user_recent_events_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe UserRecentEventsFinder do

spec/finders/users_finder_spec.rb

+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe UsersFinder do