Merge branch '233647-replace-bootstrap-alerts-to-gitlab-ui' into 'master'

Replace bootstrap alerts in app/.../_form.html.haml

Closes #233647

See merge request gitlab-org/gitlab!41271

app/views/admin/broadcast_messages/_form.html.haml

-.broadcast-message.broadcast-banner-message.alert-warning.js-broadcast-banner-message-preview.mt-2{ style: broadcast_message_style(@broadcast_message), class: ('hidden' unless @broadcast_message.banner? ) }
+.broadcast-message.broadcast-banner-message.gl-alert-warning.js-broadcast-banner-message-preview.gl-mt-3{ style: broadcast_message_style(@broadcast_message), class: ('gl-display-none' unless @broadcast_message.banner? ) }
   = sprite_icon('bullhorn', css_class:'vertical-align-text-top')
   .js-broadcast-message-preview
     - if @broadcast_message.message.present?

changelogs/unreleased/233647-replace-bootstrap-alerts-to-gitlab-ui.yml

+---
+title: Replace bootstrap alerts in app/views/admin/broadcast_messages/_form.html.haml
+merge_request: 41271
+author: Gilang Gumilar
+type: changed