ee/spec/features/projects/new_project_spec.rb fails if GitHub is down

GitHub was down for a while, and in https://gitlab.com/gitlab-org/gitlab/-/jobs/4568252354 I see:

    1.3) Failure/Error: @app.call(env)
          Faraday::ConnectionFailed:
            Failed to open TCP connection to api.github.com:443 (execution expired)
          # ./lib/gitlab/octokit/middleware.rb:18:in `call'
          # ./app/controllers/import/github_groups_controller.rb:31:in `client_orgs'
          # ./app/controllers/import/github_groups_controller.rb:27:in `importable_orgs'
          # ./app/controllers/import/github_groups_controller.rb:23:in `serialized_provider_groups'
          # ./app/controllers/import/github_groups_controller.rb:15:in `block (2 levels) in status'
          # ./app/controllers/import/github_groups_controller.rb:13:in `status'
          # ./ee/lib/gitlab/ip_address_state.rb:10:in `with'
          # ./ee/app/controllers/ee/application_controller.rb:45:in `set_current_ip_address'
          # ./lib/gitlab/auth/current_user_mode.rb:72:in `with_current_admin'
          # ./app/controllers/application_controller.rb:503:in `set_current_admin'
          # ./lib/gitlab/session.rb:11:in `with_session'
          # ./app/controllers/application_controller.rb:491:in `set_session_storage'
          # ./lib/gitlab/i18n.rb:107:in `with_locale'

The spec appears to stub api.github.com in https://gitlab.com/gitlab-org/gitlab/-/blob/f0991bf4021c8676d522ab396bd569b1575a51a8/ee/spec/features/projects/new_project_spec.rb#L170-171, but the backtrace suggests the controller is attempting to retrieve a list of organizations. I thought Webmock would block external HTTP requests. We should update this test to avoid making any external HTTP requests and investigate why this HTTP request wasn't flagged.