[FeatureRequest] Add domain for HWthreads closest to GPUs

[JanLJL]

Is your feature request related to a problem? Please describe.
Often, GPUs are not closest to the NUMA domain a humain might think (e.g., GPU 3 is closest to NUMA domain 0, etc). Not every user remembers to run likwid-topology first to get the corresponding NUMA domains for their GPU(s).

Describe the solution you'd like
Add a affinity domain for likwid-pin and likwid-perfctr, e.g., G for placing HW threads close to the GPU.
For example, pinning 10 HWthreads closest to GPU 1:

likwid-pin -C G1:0-9 ./run_app