Build

Fix crashes during and after PythonQt cleanup #560

Job	Run time
ubuntu (24.04)	13m 18s
oldschool (rockylinux, 9, debug)	4m 42s
oldschool (rockylinux, 9, release)	4m 36s
ubuntu (22.04)	18m 28s
macOS (latest, 3.11, 5.12.*, debug)	8m 12s
macOS (latest, 3.9, 5.9.*, debug)	10m 40s
macOS (latest, 3.9, 5.9.*, release)	16m 15s
windows (win64_mingw73, 3.10, 5.12.*, x64)	5m 36s
windows (win32_mingw53, 3.6, x86, 5.11.*)	6m 19s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	4m 34s
windows (win64_msvc2019_64, 3.13, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	4m 2s
	1h 36m 42s

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