Don’t use TruffleRuby’s patch

Author: chrisseaton

lib/concurrent-ruby/concurrent/configuration.rb

@@ -1,7 +1,14 @@
 require 'thread'
 require 'concurrent/delay'
 require 'concurrent/errors'
-require 'concurrent/atomic/atomic_reference'
+
+if Concurrent.on_truffleruby?
+  # Avoid TruffleRuby's patch
+  require File.expand_path('atomic/atomic_reference', __dir__)
+else
+  require 'concurrent/atomic/atomic_reference'
+end
+
 require 'concurrent/concern/logging'
 require 'concurrent/concern/deprecation'
 require 'concurrent/executor/immediate_executor'