Eager load ActiveSupport::Callback procs

Follow up to previous commit where these procs were allows to be shared
between subclasses. This change allocates the procs as they are first
declared.

Author: jhawthorn

activesupport/lib/active_support/callbacks.rb

@@ -250,6 +250,8 @@ def initialize(name, filter, kind, options, chain_config)
           @filter  = filter
           @if      = check_conditionals(options[:if])
           @unless  = check_conditionals(options[:unless])
+
+          compiled
         end
 
         def merge_conditional_options(chain, if_option:, unless_option:)