Add support for IO via ADIOS2 (with embedded VTK)

[garth-wells]

ParaView supports VTK XML meta data and heavy data in ADISO2 [1, 2] bp files. This would give the flexibility of VTK XML, but is a parallel I backend.

[1] https://github.com/ornladios/ADIOS2/
[2] https://adios2.readthedocs.io/en/latest/ecosystem/visualization.html