/usr/lib/GNUstep/SOGo/Templates is in sogo-common 2.1.1b-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/GNUstep/SOGo/../../../share/GNUstep/SOGo/Templates
/usr/lib/GNUstep/SOGo/../../../share/GNUstep/SOGo/Templates