SUNDIALS: replace copy with N_Vector module

[sebproell]

With #11278 new SUNDIALS versions will be supported. After this is merged the copy operations between dealii and SUNDIALS vectors should be replaced by "teaching" dealii's vector operations to SUNDIALS.

I already described the N_Vector module briefly here: #11278 (comment) and the documentation can be found here: https://computing.llnl.gov/sites/default/files/public/ark_guide-4.5.0_0.pdf starting on page 307.

A very simple first implementation with some tests can be found here: https://github.com/sebproell/dealii/pull/1/files. I will improve a little on this work and open a draft PR soon.

[peterrum]

Is this issue resolved?

[sebproell]

Nope, I want to at least replace the copy functions in the ARKode integrator. PR almost ready, I just need some backwards-compatibility adaptations.