Move SerializePositionalToKwargsBridge to the plugin itself

lib/manageiq/schema/engine.rb

@@ -9,12 +9,13 @@ class Engine < ::Rails::Engine
 
       ActiveSupport.on_load(:active_record) do
         require_relative 'migrate_with_cleared_schema_cache'
+        require_relative 'serialize_positional_to_kwargs_bridge'
         require_relative 'schema_statements'
         require_relative 'command_recorder'
         require_relative 'schema_dumper'
 
         ActiveRecord::Migration.prepend(MigrateWithClearedSchemaCache)
-
+        ActiveRecord::AttributeMethods::Serialization::ClassMethods.send(:prepend, ManageIQ::Schema::SerializePositionalToKwargsBridge)
         ActiveRecord::ConnectionAdapters::AbstractAdapter.include(SchemaStatements)
         ActiveRecord::Migration::CommandRecorder.include(CommandRecorder)
         ActiveRecord::ConnectionAdapters::SchemaDumper.prepend(SchemaDumper)

lib/manageiq/schema/serialize_positional_to_kwargs_bridge.rb

@@ -0,0 +1,19 @@
+module ManageIQ
+  module Schema
+    module SerializePositionalToKwargsBridge
+      def serialize(*args, **options)
+        return super if Rails.version >= "7.1"
+
+        # For rails 7.0.x, convert 7.1+ kwargs for coder/type into the positional argument
+        # class_name_or_coder
+        if options[:coder]
+          args << options.delete(:coder)
+        elsif options[:type]
+          args << options.delete(:type)
+        end
+
+        super(*args, **options)
+      end
+    end
+  end
+end