Build

Use Qt 6 for macOS workflow #765

Job	Run time
ubuntu (22.04)	7m 24s
macOS (latest, 3.10, 6.11.*, release)	1h 9m 35s
macOS (latest, 3.10, 6.11.*, debug)	1h 12m 58s
ubuntu (24.04)	7m 52s
oldschool (rockylinux, 9, debug)	4m 43s
macOS (latest, 3.11, 6.11.*, debug)	1h 12m 26s
oldschool (rockylinux, 9, release)	5m 32s
windows (win32_mingw53, 3.6, x86, 5.11.*)	6m 40s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	4m 49s
windows (win64_msvc2019_64, 3.13, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	3m 39s
windows (win64_mingw73, 3.10, 5.12.*, x64)	6m 12s
	4h 21m 50s

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