[NPU]ZeRO-Infinity feature compatibility (#5077)
NPU hardware platform does not support `O_DIRECT`.
Surrounded by `#if defined`, it will have no impact on other hardware
platforms such as GPUs
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Co-authored-by: Logan Adams <114770087+loadams@users.noreply.github.com>
Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com>
