Support None as op input in GraphBuilder #12000

Job	Run time
update_readme	5s
build_docs (ubuntu-latest)	3m 1s
build_docs (windows-latest)	4m 19s
test (ubuntu-latest, py311)	22m 56s
test (ubuntu-latest, py311-onnx-weekly)	25m 28s
test (windows-latest, py310)	8m 53s
test (windows-latest, py311-ort-nightly)	9m 21s
test (ubuntu-latest, py311-torch-nightly)	22m 3s
test (windows-latest, py311)	9m 22s
test (windows-latest, py311-onnx-weekly)	10m 10s
test (ubuntu-latest, py312)	22m 26s
test (windows-latest, py312)	9m 58s
test (windows-latest, py311-torch-nightly)	9m 22s
test (ubuntu-latest, py311-onnx-ir-git)	23m 27s
test (ubuntu-latest, py311-ort-nightly)	23m 41s
test (macos-latest, py312)	22m 54s
test (windows-latest, py311-onnx-ir-git)	9m 3s
test (ubuntu-latest, py310)	25m 45s
test (macos-latest, py311-ort-nightly)	12m 42s
test (macos-latest, py311)	7m 39s
test (macos-latest, py310)	6m 35s
test (macos-latest, py311-torch-nightly)	9m 17s
test (macos-latest, py311-onnx-weekly)	7m 18s
test (macos-latest, py311-onnx-ir-git)	6m 44s
	5h 12m 29s

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