/usr/lib/x86_64-linux-gnu/libdevhelp-3.so is in libdevhelp-dev 3.22.0-1+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdevhelp-3.so.2.0.0
/usr/lib/x86_64-linux-gnu/libdevhelp-3.so.2.0.0