[webgpu] Optimize DP4AMatMulNBitsSmallMProgram for intel#2
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[webgpu] Optimize DP4AMatMulNBitsSmallMProgram for intel#2
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Description
This PR optimizes the Intel path for the
DP4AMatMulNBitsSmallMProgramby tuningtile_sizeandtile_size_k_vec.Motivation and Context
With this change, we achieved >8% performance boost on Intel iGPUs (Xe-LP and Xe2-LPG) for phi-4-mini-accuracy4 model.