Profile redirect notes (#5746)

* Serialize moved accounts into REST and ActivityPub APIs

* Parse federated moved accounts from ActivityPub

* Add note about moved accounts to public profiles

* Add moved account message to web UI

* Fix code style issues

app/views/accounts/show.html.haml

@@ -14,6 +14,8 @@
 
 - if @account.memorial?
   .memoriam-strip= t('in_memoriam_html')
+- elsif @account.moved?
+  = render partial: 'moved_strip', locals: { account: @account }
 - elsif show_landing_strip?
   = render partial: 'shared/landing_strip', locals: { account: @account }