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Generator fixes for Qt 6.7 (#224) #403

Job	Run time
macOS (11, 3.6, 5.9.*, release)	18m 27s
oldschool (centos, 7, python-debug, debug)	5m 27s
macOS (11, 3.6, 5.9.*, debug)	6m 36s
ubuntu (20.04)	21m 33s
oldschool (centos, 7, python-debug, release)	5m 26s
macOS (12, 3.11, 5.12.*, debug)	3m 28s
ubuntu (22.04)	18m 10s
oldschool (rockylinux, 9, python3-devel, release)	5m 9s
windows (win64_mingw73, 3.10, 5.12.*, x64)	5m 47s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	4m 30s
windows (win64_msvc2019_64, 3.12, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	3m 53s
windows (win32_mingw53, 3.6, x86, 5.11.*)	7m 16s
	1h 45m 42s

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