[WIP][webgpu] Fused GeneratePositionIDs into FusedQKRotaryEmbedding #6873

Job	Run time
precheck	1m 36s
wasm_Release / build-wasm	47m 21s
wasm_Debug / build-wasm	51m 39s
wasm_Release_static_library / build-wasm	7m 40s
web_Release / build_onnxruntime_web	58m 31s
web_Debug / build_onnxruntime_web	41m 47s
	3h 28m 34s

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