Allow sdpa fusion to accept custom scale factor #9385

Job	Run time
build_docs (ubuntu-latest)	2m 43s
update_readme	6s
build_docs (windows-latest)	5m 26s
test (ubuntu-latest, py312)	16m 11s
test (ubuntu-latest, py311)	16m 38s
test (ubuntu-latest, py311-torch-nightly)	15m 6s
test (ubuntu-latest, py311-onnx-weekly)	15m 48s
test (ubuntu-latest, py311-ort-nightly)	3m 31s
test (ubuntu-latest, py310)	16m 20s
test (windows-latest, py312)	3m 40s
test (windows-latest, py311)	7m 28s
test (windows-latest, py311-torch-nightly)	8m 29s
test (windows-latest, py311-onnx-weekly)	7m 44s
test (windows-latest, py311-ort-nightly)	3m 25s
test (windows-latest, py310)	7m 33s
test (macos-latest, py312)	8m 17s
test (macos-latest, py311)	8m 23s
test (macos-latest, py311-torch-nightly)	7m 11s
test (macos-latest, py311-onnx-weekly)	6m 51s
test (macos-latest, py311-ort-nightly)	5m 9s
test (macos-latest, py310)	7m 32s
	2h 53m 31s

Provide feedback