Adjust rubocop to latest standards

running it, it said:

> rubocop-i18n extension supports plugin, specify `plugins: rubocop-i18n` instead of `require: rubocop-i18n` in /home/runner/work/puppet/puppet/.rubocop.yml. For more information, see https://docs.rubocop.org/rubocop/plugin_migration_guide.html.

Author: bastelfreak

.rubocop.yml

@@ -1,12 +1,14 @@
 inherit_from: .rubocop_todo.yml
 
-require:
+plugins:
   - rubocop-i18n
   - rubocop-performance
   - rubocop-rake
+require:
   - rubocop-rspec
 
 AllCops:
+  NewCops: disable
   TargetRubyVersion: 3.1
   Include:
     - 'lib/**/*.rb'