/usr/share/dbconfig-common/ is in icinga2-ido-pgsql 2.4.1-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbconfig-common/data/
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/install/
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/install/pgsql
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/pgsql/
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/pgsql/2.0.2
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/pgsql/2.1.0
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/pgsql/2.2.0
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/pgsql/2.3.0
/usr/share/dbconfig-common/data/icinga2-ido-pgsql/upgrade/pgsql/2.4.0