fix: remove GPU node selector from benchmark jobs

[abatilo]

Benchmark jobs execute performance tests against inference services and don't require GPU resources themselves. Removing the nvidia.com/gpu node selector allows these jobs to run on any available node, improving scheduling flexibility and resource utilization.

[slin1237]

GenAI-bench requires tokenizer That tokenizer is currently only available in GPU nodes the problem is probably how we handled getting the tokenizer benchmark controller