Follow up to https://wikitech.wikimedia.org/wiki/Incident_documentation/2021-11-05_TOC_language_converter#Actionables

Enable pig latin variant on English Wikipedia beta cluster. This has two benefits:

It allows easier testing of variant-related issues in beta, for example to validate a patch on master before cherry-picking it to production.
It possibly also facilitates earlier visibility of issues involving language variants, although effectiveness requires someone to activity monitor the status of this wiki.