Implement the all_values convenience function #1470

Job	Run time
build_docs (windows-latest)	2m 10s
test (windows-latest, py310)	1m 49s
build_docs (ubuntu-latest)	1m 26s
test (ubuntu-latest, py313)	1m 23s
test (ubuntu-latest, py312-onnx-weekly)	1m 24s
test (windows-latest, py312-onnx-weekly)	2m 2s
test (macos-latest, py313)	1m 3s
test (ubuntu-latest, py310)	1m 14s
test (macos-latest, py312-onnx-weekly)	59s
test (macos-latest, py310)	2m 14s
test (windows-latest, py313)	1m 55s
Build	11s
Release	0s
	17m 50s

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