Revert to use a simpler check for `ee-files-location-check`
This job used to use a very simple way to check the difference, which could give some false positive or false negative, but it's at least very reliable. (and we didn't really get false result, because we're not moving files often)
The current check is based on a very complex way to eliminate false positive and false negative inherited from ee-specific-lines-check
which is needed for lines difference, but it's pretty broken at the moment.
We have two issues right now to fix the issues:
- https://gitlab.com/gitlab-org/gitlab-ee/issues/5960
- https://gitlab.com/gitlab-org/gitlab-ee/issues/6038
Yet the fix is somehow stuck: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5719
We could at least revert ee-files-location-check
so that it works for most of the cases.