Quarantine flaky search specs that failed due to connection timeout

ee/spec/requests/api/search_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe API::Search, factory_default: :keep do
+RSpec.describe API::Search, factory_default: :keep, quarantine: 'https://gitlab.com/gitlab-org/gitlab/-/issues/347078' do
   let_it_be(:user) { create(:user) }
   let_it_be(:group) { create(:group) }
   let_it_be(:namespace) { create_default(:namespace).freeze }

ee/spec/requests/search_controller_spec.rb

@@ -30,7 +30,7 @@ RSpec.describe SearchController, type: :request do
     end
   end
 
-  describe 'GET /search' do
+  describe 'GET /search', quarantine: 'https://gitlab.com/gitlab-org/gitlab/-/issues/347078' do
     context 'when elasticsearch is enabled', :elastic, :clean_gitlab_redis_shared_state, :sidekiq_inline do
       before do
         stub_ee_application_setting(elasticsearch_search: true, elasticsearch_indexing: true)