Float8E4M3FNUZ -> Float8E4M3FN for NVIDIA PTX #8

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@acollins3

The following contributors were found for this pull request:

✅ 4848464 Author: @acollins3 <ac****ns@nvidia.com>
✅ 1036fb7 Author: @vwbaker <vw****r@google.com>
✅ cc5f6a3 Author: @gflegar <gf****r@google.com>
✅ 04b0b9c Author: @reichlfl <63750742+reichlfl@users.noreply.github.com>
✅ 5e26bcf Author: @karupayun <ka*****un@google.com>
✅ f5cd2cf Author: @chsigg <chsigg@users.noreply.github.com>

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