Add /usr/bin/c++ symlink for the selected compiler #124

Job	Run time
build (linux/amd64, ubuntu-24.04, bookworm, clang, 16)	1m 46s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 19)	1m 48s
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 12)	1m 47s
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 14)	2m 40s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 18)	2m 0s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 20)	2m 15s
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 13)	2m 29s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 13)	1m 59s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 14)	2m 17s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 12)	2m 2s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 17)	3m 13s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 20)	2m 6s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 19)	1m 55s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 18)	3m 3s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 17)	3m 17s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 16)	3m 18s
merge	0s
	37m 55s

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