experiment: GPU Overprovisioning #262
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This PR adds a new env-var knob,
HARMONY_GPU_OVERPROVISION_FACTOR, which when set to values >1 will make each "GPU" present itself as N GPUs.For example when set to 2 on a snap encode worker, each GPU will handle two independent encode processes at once. TBD if this makes sense. Note that snark workloads will probably struggle with memory on non-enterprise GPUs.