Improve performance of end-to-end test

By fabricating the issue resource via API call instead of via the
GUI.

qa/qa/specs/features/browser_ui/2_plan/issue/collapse_comments_in_discussions_spec.rb

@@ -9,10 +9,12 @@ module QA
         Runtime::Browser.visit(:gitlab, Page::Main::Login)
         Page::Main::Login.perform(&:sign_in_using_credentials)
 
-        Resource::Issue.fabricate_via_browser_ui! do |issue|
+        issue = Resource::Issue.fabricate_via_api! do |issue|
           issue.title = issue_title
         end
 
+        issue.visit!
+
         expect(page).to have_content(issue_title)
 
         Page::Project::Issue::Show.perform do |show_page|