Python 3.12 support / imp module deleted #1962

Job	Run time
cpp_build (ubuntu-latest)	1m 59s
py_build_test (ubuntu-latest, 3.7)	4m 15s
cpp_build (windows-latest)	2m 55s
py_build_test (ubuntu-latest, 3.8)	3m 28s
cpp_build (macos-latest)	4m 29s
py_build_test (ubuntu-latest, 3.9)	4m 22s
py_build_test (ubuntu-latest, 3.10)	4m 5s
py_build_test (ubuntu-latest, 3.11)	3m 35s
py_build_test (ubuntu-latest, 3.12)	3m 59s
py_build_test (windows-latest, 3.7)	5m 27s
py_build_test (windows-latest, 3.8)	5m 32s
py_build_test (windows-latest, 3.9)	5m 28s
py_build_test (windows-latest, 3.10)	5m 30s
py_build_test (windows-latest, 3.11)	5m 30s
py_build_test (windows-latest, 3.12)	5m 16s
py_build_test (macos-latest, 3.7)	5m 34s
py_build_test (macos-latest, 3.8)	5m 38s
py_build_test (macos-latest, 3.9)	5m 37s
py_build_test (macos-latest, 3.10)	5m 35s
py_build_test (macos-latest, 3.11)	5m 35s
py_build_test (macos-latest, 3.12)	5m 38s
py_build_test (windows-latest, mingw64, msys2)	5m 31s
package_sdist	0s
package_wheels	0s
	1h 44m 58s

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