Add AIE2P (npu2) elementwise herd width: 8 threads for 8-column array #286

Job	Run time
Build triton wheel (Python 3.10)	50m 35s
Build triton wheel (Python 3.14)	37m 45s
Build triton wheel (Python 3.13)	45m 55s
Build triton wheel (Python 3.11)	46m 1s
Build triton wheel Windows (Python 3.12)	45m 47s
Build triton wheel Windows (Python 3.10)	47m 8s
Build triton wheel (Python 3.12)	50m 19s
Build triton wheel Windows (Python 3.11)	50m 57s
Check for new commits	-1s
Publish wheels to GitHub release	-1s
	6h 14m 25s

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