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bbc6a54f - [MLIR][XeGPU] Remove create tdesc & update offset op from xegpu dialect (#182804)

[MLIR][XeGPU] Remove create tdesc & update offset op from xegpu dialect (#182804) This PR removes create_tdesc and update_offset ops from the XeGPU dialect, as scatter load/store/prefetch now accept memref+offsets directly.