Merge branch '354588-migrate_no_teams-partial' into 'master'

Make alert pajamas compliant for mattermost

See merge request gitlab-org/gitlab!84232

app/views/projects/mattermosts/_no_teams.html.haml

 - if @teams_error_message
   = content_for :flash_message do
-    .gl-alert.gl-alert-danger
-      = sprite_icon('error', css_class: 'gl-icon gl-alert-icon gl-alert-icon-no-title')
-      .gl-alert-body= @teams_error_message
+    = render Pajamas::AlertComponent.new(variant: :danger) do
+      .gl-alert-body
+        = @teams_error_message
 
 %p
   You aren’t a member of any team on the Mattermost instance at