CMake

CI: Fix MSYS and isolate emscripten #52

Job	Run time
build-web (emscripten, Debug, 3.1.61)	35s
build-web (emscripten, Release, 3.1.61)	35s
build (Linux-x64, DAWN, SHARED, Debug)	39s
build (Linux-x64, DAWN, SHARED, Release)	40s
build (Linux-x64, WGPU, SHARED, Debug)	38s
build (Linux-x64, WGPU, SHARED, Release)	39s
build (Linux-x64, WGPU, STATIC, Debug)	41s
build (Linux-x64, WGPU, STATIC, Release)	46s
build (Windows-MSVC-x64, DAWN, SHARED, Debug)	1m 25s
build (Windows-MSVC-x64, DAWN, SHARED, Release)	1m 16s
build (Windows-MSVC-x64, WGPU, SHARED, Debug)	1m 25s
build (Windows-MSVC-x64, WGPU, SHARED, Release)	1m 39s
build (Windows-MSVC-x64, WGPU, STATIC, Debug)	1m 33s
build (Windows-MSVC-x64, WGPU, STATIC, Release)	1m 40s
build (Windows-MSYS-x64, DAWN, SHARED, Debug)	1m 47s
build (Windows-MSYS-x64, DAWN, SHARED, Release)	1m 50s
build (Windows-MSYS-x64, WGPU, SHARED, Debug)	1m 54s
build (Windows-MSYS-x64, WGPU, SHARED, Release)	2m 26s
build (Windows-MSYS-x64, WGPU, STATIC, Debug)	1m 46s
build (Windows-MSYS-x64, WGPU, STATIC, Release)	1m 47s
build (MacOS-x64, DAWN, SHARED, Debug)	2m 10s
build (MacOS-x64, DAWN, SHARED, Release)	1m 0s
build (MacOS-x64, WGPU, SHARED, Debug)	53s
build (MacOS-x64, WGPU, SHARED, Release)	1m 54s
build (MacOS-x64, WGPU, STATIC, Debug)	1m 29s
build (MacOS-x64, WGPU, STATIC, Release)	59s
build (MacOS-ARM, DAWN, SHARED, Debug)	32s
build (MacOS-ARM, DAWN, SHARED, Release)	33s
build (MacOS-ARM, WGPU, SHARED, Debug)	31s
build (MacOS-ARM, WGPU, SHARED, Release)	33s
build (MacOS-ARM, WGPU, STATIC, Debug)	36s
build (MacOS-ARM, WGPU, STATIC, Release)	34s
	37m 25s

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