Merge branch 'ml-quarantine-test' into 'master'

Quarantine flaky and stale test

See merge request gitlab-org/gitlab!48577

qa/qa/specs/features/browser_ui/3_create/merge_request/view_merge_request_merge_ref_diff_spec.rb

 # frozen_string_literal: true
 
 module QA
-  RSpec.describe 'Create', :requires_admin do
+  RSpec.describe 'Create', :requires_admin, quarantine: { issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/261793', type: :investigating } do
     describe 'View merge request merge-ref diff' do
       let(:project) do
         Resource::Project.fabricate_via_api! do |project|