Merge remote-tracking branch 'origin/feature/10091_new_bilby_format'
Implement a virtual clone method for geometry handlers

This provides a simple mechanism for copying the objects when their
type is not available.
Refs #10178
Use handler::clone method in Object copy and assignment.

The new object now retains the same handler properties as the original.
Refs #10178
Implement unit tests for Object copy and assignment.

Refs #10178
Merge branch 'bugfix/10178_geometry_object_copy_and_assign' into develop