cube: Support runtime selection of WSI platform #622

Job	Run time
chromium	1m 32s
codegen	21s
linux (gcc, g++, Debug, ubuntu-20.04)	56s
android (armeabi-v7a)	35s
linux (gcc, g++, Debug, ubuntu-22.04)	49s
mac	11m 33s
android (arm64-v8a)	37s
mingw	1m 50s
linux (gcc, g++, Release, ubuntu-20.04)	1m 7s
linux (gcc, g++, Release, ubuntu-22.04)	49s
tools_codegen	50s
windows (Win32, Debug, windows-latest)	1m 37s
linux (clang, clang++, Debug, ubuntu-20.04)	1m 23s
linux (clang, clang++, Release, ubuntu-22.04)	55s
windows (Win32, Release, windows-latest)	1m 36s
windows (x64, Debug, windows-latest)	1m 32s
windows (x64, Release, windows-latest)	1m 36s
	29m 38s

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