Add NVIDIA backend to benchmarks.

[dlasecki]

According to this announcement, there will be a new backend powered by NVIDIA available through Qiskit as an Aer backend: https://blogs.nvidia.com/blog/2021/11/09/google-quantum-computing/.

The new backend is claimed to be very efficient. The goal of this issue is to add the new backend to the pool of backends used by Qiskit App benchmarks. It would be interesting to verify the performance in practice.