Test python 3.12 #778

Job	Run time
trigger	1s
linters	34s
build	20s
update-notebooks-for-colab-and-binder	2s
test (ubuntu-latest, 3.8)	13m 21s
test (ubuntu-latest, 3.12)	13m 21s
test (ubuntu-latest, 3.12, without gurobi)	13m 23s
test (macos-12, 3.8)	13m 21s
test (macos-latest, 3.12)	13m 26s
test (windows-latest, 3.8)	13m 14s
test (windows-latest, 3.12)	13m 14s
build-doc / build-doc	1m 38s
deploy	1s
deploy-doc	1s
	1h 35m 57s

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