Request for Review: PR-16585 Adding float8_e4m3 Support

[Alexander Pivovarov]

Hello everyone,

I am seeking help with the review of PR-16585 that introduces support for the float8_e4m3 type. This type has already been merged into LLVM, MLIR, StableHLO, and ml_dtypes.

This XLA PR is crucial as it paves the way for integrating float8_e4m3 support into JAX.

Thank you for your time and consideration.

Best regards,
Alex