I'm moving this for two (related) reasons:
* It depends a lot on the specifics of `Camera` and `Object` data-blocks.
* It links `Object::object_to_world()` which is not an inline function and thus
easily leads to linker errors. It mostly seems like luck that this is not
breaking our build due to early dead code elimination when linking binaries
which use the blenlib static library such as `msgfmt`.
I found this while working on a compilation tool which would not be as lucky and
has a linker error because of the dependence on `Object::object_to_world`.
Pull Request: https://projects.blender.org/blender/blender/pulls/136547
202db40afb