[ONNX FE][Transformation] GroupQueryAttention refine work for NPU static shape design#34980

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bopeng1234:onnx_gqa_refine

Commits on Mar 27, 2026

initial refine work fro ONNX GQA, insert new kv into the past kv, valid data is in front of the buffer as MLAS does
bopeng1234
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Commits on Mar 30, 2026

add ScatterUpdate method, NPU will hang with that
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