Revert "FIX: update Redis gem to version 4.1.3 (#8197)"

This reverts commit ab74a50d857c6a0ac7e5c11f9d8ddd12ee5e1805.

We really want to upgrade redis, but discovered some edge cases
around failover we need to test.

Holding off on the upgrade till a bit more testing happens

config/application.rb

@@ -241,6 +241,7 @@ module Discourse
 
     require 'discourse_redis'
     require 'logster/redis_store'
+    require 'freedom_patches/redis'
     # Use redis for our cache
     config.cache_store = DiscourseRedis.new_redis_store
     $redis = DiscourseRedis.new