Add _desired_num_gpus
attribute to CudaDevicePlacementMixin
#795
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Description
This PR adds a new attribute
_desired_num_gpus
to theCudaDevicePlacementMixin
that will be set as value theStep.resources.gpus
. This attribute will be used by the mixin whencuda_devices == "auto"
to assign the desired num of GPUs to the LLM if available.