macOS

adjust sdl-test-ui to use GLAD and SDL2 to get gl functions #739

Job	Run time
Framework: C only, Arch: arm64, Build OS: macos-15	45s
Framework: C + C++, Arch: arm64, Build OS: macos-15	39s
Libs: shared, FS Lib: boost, Arch: x86_64, Build OS: macos-15-intel	3m 19s
Framework: C + C++, Arch: x86_64, Build OS: macos-15-intel	1m 23s
Libs: static, FS Lib: stl, Arch: arm64, Build OS: macos-15	1m 48s
Libs: static, FS Lib: boost, Arch: x86_64, Build OS: macos-15-intel	3m 5s
Libs: static, FS Lib: stl, Arch: x86_64, Build OS: macos-15-intel	2m 9s
Libs: shared, FS Lib: stl, Arch: x86_64, Build OS: macos-15-intel	2m 46s
Libs: shared, FS Lib: stl, Arch: arm64, Build OS: macos-15	1m 40s
Framework: C only, Arch: x86_64, Build OS: macos-15-intel	1m 13s
	18m 47s

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