`ActiveSupport::Cache::RedisCacheStore` is not compatible with the
version of Rack Attack we are using (v4.4.1) per
https://github.com/kickstarter/rack-attack/issues/281. Users that had
rate limits enabled might see `Redis::CommandError: ERR value is not an
integer or out of range` because the `raw` parameter wasn't passed along
properly. As a result, the Rack Attack entry would be stored as an
`ActiveSupport::Cache::Entry` instead of a raw string holding an integer
value.

Let's partially revert the change in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30966 to use the
original cache store until we can update to Rack Attack v5.2.3 that has
support for `ActiveSupport::Cache::RedisCacheStore` via
https://github.com/kickstarter/rack-attack/pull/350.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/66449