/usr/lib/x86_64-linux-gnu/libpwquality.so is in libpwquality-dev 1.4.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpwquality.so.1.0.2
/usr/lib/x86_64-linux-gnu/libpwquality.so.1.0.2