Update ptxla training (#9864)
* update ptxla example
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Co-authored-by: Juan Acevedo <jfacevedo@google.com>
Co-authored-by: Pei Zhang <zpcore@gmail.com>
Co-authored-by: Pei Zhang <piz@google.com>
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
Co-authored-by: Pei Zhang <pei@Peis-MacBook-Pro.local>
Co-authored-by: hlky <hlky@hlky.ac>
