Add enqueue_after_transaction_commit? for Rails 7.2 compatibility (#777)

* Add enqueue_after_transaction_commit? for Rails 7.2 compatibility

* Better to inherit from ActiveJob::QueueAdapters::AbstractAdapter

and the default for enqueue_after_transaction_commit? is true - see https://github.com/rails/rails/pull/51426/files#diff-572a695cc044413e9d509392a9230f9fbe8a039518f3e438a3c88f2b6a259480

* Remove test since it does not add much value

and it complicates testing agaainst rails versions less than 7.2

* Attempt to fix CI

ActiveJob::QueueAdapters::AbstractAdapter was only introduced in Rails 7.2.0 so let's retain compatability with older Rails versions by not referencing it

---------

Co-authored-by: Pablo Cantero <pablohstc@gmail.com>
Co-authored-by: Maciej Mensfeld <maciej@mensfeld.pl>

Author: 3 people

lib/shoryuken/extensions/active_job_adapter.rb

@@ -30,6 +30,11 @@ def enqueue_at(job, timestamp)
         end
       end
 
+      # only required for Rails 7.2.x
+      def enqueue_after_transaction_commit?
+        true
+      end
+
       def enqueue(job, options = {}) #:nodoc:
         register_worker!(job)