/usr/lib/linux-tools/4.18.0-15-lowlatency/turbostat is in linux-tools-4.18.0-15-lowlatency 4.18.0-15.16~18.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/4.18.0-15-lowlatency/../../linux-hwe-tools-4.18.0-15/turbostat