Add ESIMD mode to GPU Occupancy Calculator

[DDEle]

Summary

Add ESIMD mode to GPU Occupancy Calculator

Problem statement

ESIMD mode has a sub-group size of 1. Uses do have a workaround to manually choose a random sub-group size and multiply it to wg size and global size. But a separate option is better.

Preferred solution

Add an option to SIMD/sub-group size dropdown.