pub fn cpu_proving_ctx_to_gpu<HS: GpuHashScheme>(
cpu_ctx: AirProvingContext<CpuBackend<SC>>,
device_ctx: &GpuDeviceCtx,
) -> AirProvingContext<GenericGpuBackend<HS>>pub fn cpu_proving_ctx_to_gpu<HS: GpuHashScheme>(
cpu_ctx: AirProvingContext<CpuBackend<SC>>,
device_ctx: &GpuDeviceCtx,
) -> AirProvingContext<GenericGpuBackend<HS>>