/usr/lib/x86_64-linux-gnu/libzdb.so is in libzdb-dev 2.11.3-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libzdb.so.9.0.2
/usr/lib/x86_64-linux-gnu/libzdb.so.9.0.2