onnxruntime

d4e31dc6 - Improve SimplifiedLayerNorm by using same techniques as SkipSimplifiedLayerNorm (#25850)

Improve SimplifiedLayerNorm by using same techniques as SkipSimplifiedLayerNorm (#25850) ### Description Use similar shaders as SkipSimplifiedLayerNorm in SimplifiedLayerNorm, to fix the performance issues with SimplifiedLayerNorm. ### Motivation and Context Prior to this change, generation in Bitnet was bottlenecked on SimplifiedLayerNorm <img width="332" height="378" alt="image" src="https://github.com/user-attachments/assets/3bc16ac1-ef7d-46bf-b403-92fc9192a2df" /> with this change performance has now improved to match SkipSimplifiedLayerNorm <img width="699" height="179" alt="image" src="https://github.com/user-attachments/assets/30009d85-d5d9-4585-987a-b39ecf52e0b5" />