Update to Python 3.12 #3081

Job	Run time
Test (7.2.1, ubuntu-latest, gcc)	1m 58s
Test (7.2.1, ubuntu-latest, clang)	2m 9s
Test (7.2.1, macos-latest, clang)	16m 7s
Test (7.2.1, windows-latest, msvc)	11m 15s
Test (7.4.1, ubuntu-latest, gcc)	17m 35s
Test (7.4.1, ubuntu-latest, clang)	2m 6s
Test (7.4.1, macos-latest, clang)	12m 53s
Test (7.4.1, windows-latest, msvc)	11m 43s
Test (8.0.0, ubuntu-latest, gcc)	2m 4s
Test (8.0.0, ubuntu-latest, clang)	1m 59s
Test (8.0.0, macos-latest, clang)	12m 33s
Test (8.0.0, windows-latest, msvc)	12m 13s
Test (latest, ubuntu-latest, gcc)	19m 6s
Test (latest, ubuntu-latest, clang)	23m 38s
Test (latest, macos-latest, clang)	13m 3s
Test (latest, windows-latest, msvc)	20m 55s
	3h 1m 17s

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