bug#52046: [core-updates-frozen] vtk-8 fails to build

[Mathieu Othacehe]

Hello,

> VTK 8 fails to build on core-updates-frozen.  This blocks freecad. 
> It looks like libraries aren’t properly linked with other VTK 
> libraries.  The build log is littered with output like this:

The vtk-8 package was dedicated to freecad. I managed to get freecad to
use vtk-9 so that we can get rid of vtk-8. I also fixed the freecad
build.

See commit a5cdd82ecd0136346d5716f9d7f093fcb684cd66 to
6805ab3290f54cd1859f54e23d0213b110b07764 on c-u-f.

Thanks,

Mathieu