Add ability for admins to delete canonical email blocks (#16644)

* Add admin option to remove canonical email blocks from a deleted account

* Add tootctl canonical_email_blocks to inspect and remove canonical email blocks

config/routes.rb

@@ -249,6 +249,7 @@ Rails.application.routes.draw do
         post :memorialize
         post :approve
         post :reject
+        post :unblock_email
       end
 
       collection do