Fix a weird bug with Rails <= 7.1 where performed_jobs was being zero…

…ed out during a test simulation

This appears to be due to `queue_adapter_for_test` being set to a fresh instance of the test adapter, such that a new state for performed_jobs was now present.

test/test_helper.rb

@@ -74,3 +74,12 @@ def before_setup
 
   def after_teardown; end
 end
+
+class ActiveJob::TestCase
+  # This needs to be set to `nil` to avoid an odd bug in Rails <= 7.1
+  # where the queue adapter is given a fresh instance of the test adapter
+  # after the `after_teardown` hook is called.
+  def queue_adapter_for_test
+    nil
+  end
+end