未开启内容审核的情况下，加载project tree content 无需请求 content_blocked_state 接口

Problem

目前有一个feature测试失败了 https://jihulab.com/gitlab-cn/gitlab/-/jobs/2994651 ，这个测试失败的原因是在 JH 版本中， project 详情页加载目录树的逻辑是会先去请求 content_blocked_state 接口，然后再去加载目录树，而这个测试中，执行了 Gitlab::Testing::RobotsBlockerMiddleware.block_requests! ，这会使 content_blocked_state 接口返回 503，会阻塞后续的页面渲染，导致测试中无法获取到 readme，测试失败。

# ./spec/features/projects/show/user_sees_readme_spec.rb
context 'obeying robots.txt' do
    before do
      Gitlab::Testing::RobotsBlockerMiddleware.block_requests!
    end

    after do
      Gitlab::Testing::RobotsBlockerMiddleware.allow_requests!
    end

    # For example, see this regression we had in
    # https://gitlab.com/gitlab-org/gitlab/-/merge_requests/39520
    it 'does not block the requests necessary to load the project README', :js do
      visit project_path(project)
      wait_for_requests

      page.within('.readme-holder') do
        expect(page).to have_content 'testme'
      end
    end
  end

proposal

页面加载前，后端通过gon向前端传递信息是否开启 content_valicaiton , 前端根据这个值来决定是否在加载 project 详情页的时候去请求 content_blocked_state 接口