Python 3.12 support / imp module deleted #1963

Job	Run time
cpp_build (ubuntu-latest)	2m 6s
cpp_build (windows-latest)	3m 38s
py_build_test (ubuntu-latest, 3.7)	4m 28s
cpp_build (macos-latest)	6m 34s
py_build_test (ubuntu-latest, 3.8)	4m 19s
py_build_test (ubuntu-latest, 3.9)	3m 39s
py_build_test (ubuntu-latest, 3.10)	3m 45s
py_build_test (ubuntu-latest, 3.11)	4m 0s
py_build_test (ubuntu-latest, 3.12)	4m 34s
py_build_test (windows-latest, 3.7)	5m 5s
py_build_test (windows-latest, 3.8)	5m 5s
py_build_test (windows-latest, 3.9)	5m 0s
py_build_test (windows-latest, 3.10)	5m 9s
py_build_test (windows-latest, 3.11)	5m 7s
py_build_test (windows-latest, 3.12)	4m 55s
py_build_test (macos-latest, 3.7)	5m 15s
py_build_test (macos-latest, 3.8)	5m 11s
py_build_test (macos-latest, 3.9)	5m 4s
py_build_test (macos-latest, 3.10)	5m 15s
py_build_test (macos-latest, 3.11)	5m 13s
py_build_test (macos-latest, 3.12)	5m 16s
py_build_test (windows-latest, mingw64, msys2)	5m 8s
package_sdist	0s
package_wheels	0s
	1h 43m 46s

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