/usr/lib/dovecot/modules/auth/libdriver_sqlite.so is in dovecot-sqlite 1:2.0.19-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/dovecot/modules/auth/../libdriver_sqlite.so
/usr/lib/dovecot/modules/auth/../libdriver_sqlite.so