/usr/share/horde/turba/migration/ is in php-horde-turba 4.2.12-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/horde/turba/migration/10_turba_upgrade_categoriestotags.php
/usr/share/horde/turba/migration/11_turba_upgrade_parents.php
/usr/share/horde/turba/migration/1_turba_base_tables.php
/usr/share/horde/turba/migration/2_turba_upgrade_autoincrement.php
/usr/share/horde/turba/migration/3_turba_upgrade_sqlng.php
/usr/share/horde/turba/migration/4_turba_upgrade_sqlhierarchical.php
/usr/share/horde/turba/migration/5_turba_upgrade_sqlnghierarchical.php
/usr/share/horde/turba/migration/6_turba_upgrade_updateschema.php
/usr/share/horde/turba/migration/7_turba_upgrade_activesyncschema.php
/usr/share/horde/turba/migration/8_turba_fix_blob_length.php
/usr/share/horde/turba/migration/9_turba_upgrade_schema.php