/usr/share/ is in libdiagnostic-msgs-dev 1.12.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/diagnostic_msgs/
/usr/share/diagnostic_msgs/package.xml
/usr/share/diagnostic_msgs/cmake/
/usr/share/diagnostic_msgs/cmake/diagnostic_msgsConfig-version.cmake
/usr/share/diagnostic_msgs/cmake/diagnostic_msgs-msg-extras.cmake
/usr/share/diagnostic_msgs/cmake/diagnostic_msgsConfig.cmake
/usr/share/diagnostic_msgs/cmake/diagnostic_msgs-msg-paths.cmake
/usr/share/diagnostic_msgs/srv/
/usr/share/diagnostic_msgs/srv/SelfTest.srv
/usr/share/diagnostic_msgs/msg/
/usr/share/diagnostic_msgs/msg/DiagnosticArray.msg
/usr/share/diagnostic_msgs/msg/DiagnosticStatus.msg
/usr/share/diagnostic_msgs/msg/KeyValue.msg
/usr/share/doc/
/usr/share/doc/libdiagnostic-msgs-dev/
/usr/share/doc/libdiagnostic-msgs-dev/copyright
/usr/share/doc/libdiagnostic-msgs-dev/changelog.Debian.gz