Make phi model of webgpu ep always use long RoPE to improve tps performance for long context scenario#1930

feich-ms wants to merge 1 commit intomainmicrosoft/onnxruntime-genai:mainfrom

user/feich/remove_short_factormicrosoft/onnxruntime-genai:user/feich/remove_short_factorCopy head branch name to clipboard