Quarantine QA test content_editor_spec and project_templates_spec

qa/qa/specs/features/browser_ui/3_create/wiki/content_editor_spec.rb

 # frozen_string_literal: true
 
 module QA
-  RSpec.describe 'Create', :requires_admin do # remove :requires_admin once the ff is enabled by default in https://gitlab.com/gitlab-org/gitlab/-/issues/345398
+  RSpec.describe 'Create', :requires_admin, quarantine: { issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/350220', type: :investigating } do # remove :requires_admin once the ff is enabled by default in https://gitlab.com/gitlab-org/gitlab/-/issues/345398
     context 'Content Editor' do
       let(:initial_wiki) { Resource::Wiki::ProjectPage.fabricate_via_api! }
       let(:page_title) { 'Content Editor Page' }

qa/qa/specs/features/ee/browser_ui/1_manage/project/project_templates_spec.rb

@@ -2,7 +2,7 @@
 
 module QA
   RSpec.describe 'Manage' do
-    describe 'Project templates', :requires_admin do
+    describe 'Project templates', :requires_admin, quarantine: { issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/350279', type: :investigating } do
       include Support::API
 
       before(:all) do