Quarantine flaky add file template specs

See https://gitlab.com/gitlab-org/gitlab/issues/34551

qa/qa/specs/features/browser_ui/3_create/repository/add_file_template_spec.rb

 # frozen_string_literal: true
 
 module QA
-  context 'Create' do
+  # Failure issue: https://gitlab.com/gitlab-org/gitlab/issues/34551
+  context 'Create', :quarantine do
     describe 'File templates' do
       include Runtime::Fixtures
 

qa/qa/specs/features/browser_ui/3_create/web_ide/add_file_template_spec.rb

 # frozen_string_literal: true
 
 module QA
-  context 'Create' do
+  # Failure issue: https://gitlab.com/gitlab-org/gitlab/issues/34551
+  context 'Create', :quarantine do
     describe 'Web IDE file templates' do
       include Runtime::Fixtures