chore: Upgrade rails and ruby versions (#2400)

ruby version: 3.0.2
rails version: 6.1.4

spec/rails_helper.rb

@@ -23,7 +23,7 @@ require 'sidekiq/testing'
 # require only the support files necessary.
 #
 # rubocop:disable  Rails/FilePath
-Dir[Rails.root.join('spec', 'support', '**', '*.rb')].sort.each { |f| require f }
+Dir[Rails.root.join('spec', 'support', '**', '*.rb')].each { |f| require f }
 # rubocop:enable  Rails/FilePath
 
 # Checks for pending migrations and applies them before tests are run.
@@ -79,4 +79,5 @@ end
 # Required for fixture_file_upload
 FactoryBot::SyntaxRunner.class_eval do
   include ActionDispatch::TestProcess
+  include ActiveSupport::Testing::FileFixtures
 end