Merge branch 'tz-update-preload-crossorigin' into 'master'

Added crossorigin anonymous to preload tags

See merge request gitlab-org/gitlab!40108

app/views/layouts/_loading_hints.html.haml

@@ -2,9 +2,9 @@
   %link{ rel: 'dns-prefetch', href: ActionController::Base.asset_host }
   %link{ rel: 'preconnect', href: ActionController::Base.asset_host, crossorigin: '' }
 - if user_application_theme == 'gl-dark'
-  %link{ { rel: 'preload', href: stylesheet_url('application_dark'), as: 'style' }, ActionController::Base.asset_host ? { crossorigin: '' } : {} }
+  %link{ { rel: 'preload', href: stylesheet_url('application_dark'), as: 'style' }, ActionController::Base.asset_host ? { crossorigin: 'anonymous' } : {} }
 - else
-  %link{ { rel: 'preload', href: stylesheet_url('application'), as: 'style' }, ActionController::Base.asset_host ? { crossorigin: '' } : {} }
-%link{ { rel: 'preload', href: stylesheet_url("highlight/themes/#{user_color_scheme}"), as: 'style' }, ActionController::Base.asset_host ? { crossorigin: '' } : {} }
+  %link{ { rel: 'preload', href: stylesheet_url('application'), as: 'style' }, ActionController::Base.asset_host ? { crossorigin: 'anonymous' } : {} }
+%link{ { rel: 'preload', href: stylesheet_url("highlight/themes/#{user_color_scheme}"), as: 'style' }, ActionController::Base.asset_host ? { crossorigin: 'anonymous' } : {} }
 - if Gitlab::CurrentSettings.snowplow_enabled? && Gitlab::CurrentSettings.snowplow_collector_hostname
   %link{ rel: 'preconnect', href: Gitlab::CurrentSettings.snowplow_collector_hostname, crossorigin: '' }