Bug#1127672: fenics-dolfinx FTBFS on 32-bit: test failures

[Drew Parsons]

Source: fenics-dolfinx
Followup-For: Bug #1127672
Control: tags -1 ftbfs

That is unfortunate.  I've opened discussion with upstream about it.

It's only one test failing so push come to shove we can just skip the
test if necessary ("mixed mesh is no longer supported on 32-bit
architectures").

Not good for nanobind to cause a regression like that though.