Migrate alert to shared partial in notifications

Changelog: changed

app/views/profiles/notifications/show.html.haml

@@ -3,12 +3,8 @@
 
 %div
   - if @user.errors.any?
-    .gl-alert.gl-alert-danger.gl-my-5
-      .gl-alert-container
-        %button.js-close.btn.gl-dismiss-btn.btn-default.btn-sm.gl-button.btn-default-tertiary.btn-icon{ type: 'button', 'aria-label' => _('Dismiss') }
-          = sprite_icon('close', css_class: 'gl-icon')
-        = sprite_icon('error', css_class: 'gl-icon gl-alert-icon gl-alert-icon-no-title')
-        .gl-alert-content
+    = render 'shared/global_alert',
+      variant: :danger do
       .gl-alert-body
         %ul
           - @user.errors.full_messages.each do |msg|