Detect devices and MPI without deps, and warn user if they are not installed

[JuanPedroGHM]

At the moment, perun does not warn the user if there are missing dependencies for available devices. It should be capable, through other means that are not the designated backend, to detect if those devices are available, and warn the users if the library is missing.

Applies to:

• rocm
• mpi
• nvidia-ml