/usr/lib/bacula/libbaccats-mysql.so is in bacula-common-mysql 7.4.4+dfsg-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/bacula/libbaccats-mysql-7.4.4.so
/usr/lib/bacula/libbaccats-mysql-7.4.4.so