Merge branch 'tz-print-css-move' into 'master'

Moves all print styles into application.scss as performance guides say that is faster

See merge request gitlab-org/gitlab!35234

app/assets/stylesheets/application.scss

@@ -46,3 +46,8 @@
 
 // Gitlab UI util classes
 @import "@gitlab/ui/src/scss/utilities";
+
+/* print styles */
+@media print {
+  @import "print";
+}

app/views/layouts/_head.html.haml

@@ -53,7 +53,6 @@
     = stylesheet_link_tag "application_dark", media: "all"
   - else
     = stylesheet_link_tag "application", media: "all"
-  = stylesheet_link_tag "print", media: "print"
   = stylesheet_link_tag "disable_animations", media: "all" if Rails.env.test? || Gitlab.config.gitlab['disable_animations']
   = stylesheet_link_tag 'performance_bar' if performance_bar_enabled?