add tuning block wise fp8

[zhyncs]

Motivation

Last December, we wrote this code. Since not all users have h100 and h200 GPUs, we decided to open source this part of the code for advanced users to use for block wise fp8 performance tuning on their own GPUs.

Modifications

Checklist

• Format your code according to the Code Formatting with Pre-Commit.
• Add unit tests as outlined in the Running Unit Tests.
• Update documentation / docstrings / example tutorials as needed, according to Writing Documentation.
• Provide throughput / latency benchmark results and accuracy evaluation results as needed, according to Benchmark and Profiling.

[zhyncs]

Happy hacking :)