C++ CI Serial Programs

Add clang on the CI for windows and linux + fix compilation #4475

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Run time

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Job	Run time
build (macos-13, default, 6.9.1)	16m 10s
build (ubuntu-24.04, default, 6.9.1)	12m 47s
build (windows-2025, clang, 6.9.1)	16m 42s
build (windows-2025, default, 6.9.1)	22m 33s
build (ubuntu-24.04, clang, 6.9.1)	21m 20s
	1h 29m 32s