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Replace preprocessor in wrapper generator #461

Job	Run time
macOS (latest, 3.9, 5.9.*, release)	7m 48s
macOS (latest, 3.9, 5.9.*, debug)	7m 46s
oldschool (rockylinux, 9, debug)	4m 9s
macOS (latest, 3.11, 5.12.*, debug)	4m 51s
oldschool (rockylinux, 9, release)	4m 34s
ubuntu (20.04)	8m 16s
ubuntu (22.04)	7m 9s
windows (win64_mingw73, 3.10, 5.12.*, x64)	6m 14s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	4m 57s
windows (win64_msvc2019_64, 3.13, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	4m 21s
windows (win32_mingw53, 3.6, x86, 5.11.*)	6m 12s
	1h 6m 17s

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