Test public snippet

Public snippets can trigger recaptcha.
Try with a private snippet instead.

Private snippets can't be embedded, so remove that check.

Also unquarantine the test.

qa/qa/specs/features/browser_ui/3_create/snippet/create_snippet_spec.rb

 # frozen_string_literal: true
 module QA
-  # Failure issue: https://gitlab.com/gitlab-org/quality/staging/issues/49
-  context 'Create', :smoke, :quarantine do
+  context 'Create', :smoke do
     describe 'Snippet creation' do
       it 'User creates a snippet' do
         Runtime::Browser.visit(:gitlab, Page::Main::Login)
@@ -13,7 +12,7 @@ module QA
         Resource::Snippet.fabricate_via_browser_ui! do |snippet|
           snippet.title = 'Snippet title'
           snippet.description = 'Snippet description'
-          snippet.visibility = 'Public'
+          snippet.visibility = 'Private'
           snippet.file_name = 'New snippet file name'
           snippet.file_content = 'Snippet file text'
         end
@@ -21,8 +20,7 @@ module QA
         Page::Dashboard::Snippet::Show.perform do |snippet|
           expect(snippet).to have_snippet_title('Snippet title')
           expect(snippet).to have_snippet_description('Snippet description')
-          expect(snippet).to have_embed_type('Embed')
-          expect(snippet).to have_visibility_type('Public')
+          expect(snippet).to have_visibility_type('Private')
           expect(snippet).to have_file_name('New snippet file name')
           expect(snippet).to have_file_content('Snippet file text')
         end