Remove some duplication #2990

Job	Run time
Windows x64 MSVC Clang gnustep-2.2	20m 44s
Windows arm64 MSVC Clang gnustep-2.2	36m 19s
Ubuntu x64 GCC	5m 10s
Windows x64 MinGW GCC	27m 33s
Ubuntu x64 Clang gnustep-2.2	5m 15s
Windows x64 MinGW Clang gnustep-2.2	26m 47s
Rocky Linux 8 x64 Clang gnustep-2.2	2m 29s
Rocky Linux 9 x64 Clang gnustep-2.2	5m 41s
	2h 9m 58s

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