Current `auth.log` uses `fullpath` and `ip`, while `api_json.log` uses
`remote_ip` and `path` for the same fields. Let's standardize these
namings to make it easier for people working with the data.
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/66167
rack.attack.match_discriminator is only return on
throttle_authenticated_api or throttle_authenticated_web requests, so
we're avoiding logging user_id on blacklist requests
Follow up of https://gitlab.com/gitlab-org/gitlab-ce/issues/62756