Change activity distribution error handling to skip retrying for deleted accounts (#33617)

app/workers/activitypub/delivery_worker.rb

@@ -62,7 +62,7 @@ class ActivityPub::DeliveryWorker
     stoplight_wrapper.run do
       request_pool.with(@host) do |http_client|
         build_request(http_client).perform do |response|
-          raise Mastodon::UnexpectedResponseError, response unless response_successful?(response) || response_error_unsalvageable?(response)
+          raise Mastodon::UnexpectedResponseError, response unless response_successful?(response) || response_error_unsalvageable?(response) || unsalvageable_authorization_failure?(response)
 
           @performed = true
         end
@@ -70,6 +70,10 @@ class ActivityPub::DeliveryWorker
     end
   end
 
+  def unsalvageable_authorization_failure?(response)
+    @source_account.permanently_unavailable? && response.code == 401
+  end
+
   def stoplight_wrapper
     Stoplight(@inbox_url)
       .with_threshold(STOPLIGHT_FAILURE_THRESHOLD)