Merge branch...

Merge branch '353749-make-spinners-in-app-views-groups-_subgroups_and_projects-html-haml-pajamas-compliant' into 'master'

Migrate subgroups and projects list loading icon

See merge request gitlab-org/gitlab!83479

app/views/groups/_subgroups_and_projects.html.haml

@@ -4,5 +4,4 @@
 
   %section{ data: { hide_projects: 'false', group_id: group.id, path: group_path(group) } }
     .js-groups-list-holder{ data: { show_schema_markup: 'true'} }
-      .loading-container.text-center.prepend-top-20
-        .gl-spinner.gl-spinner-md
+      = gl_loading_icon(size: 'md', css_class: 'gl-mt-6')