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This adds back a check which was lost many releases back to verify /dev/kfd permissions
which when lacking, can lead to confusing failure modes of:
  "rocBLAS error: Could not initialize Tensile host: No devices found"

This implementation does not hard fail the serve command but instead will fall back to CPU
with an error log.  In the future we can include this in the GPU discovery UX to show
detected but unsupported devices we discovered.