/usr/share/doc/linux-cloud-tools-4.4.0-70-generic/changelog.Debian.gz is in linux-cloud-tools-4.4.0-70-generic 4.4.0-70.91.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-cloud-tools-4.4.0-70-generic/../linux-cloud-tools-4.4.0-70/changelog.Debian.gz