Update CI build to use clang-18 #1612

Job	Run time
conan	6m 36s
bindings	17m 50s
build (clang-sanitize, ubuntu-22.04)	33m 13s
build (gcc-release, ubuntu-22.04)	7m 34s
build (gcc-11-release, ubuntu-22.04)	7m 47s
linux-coverage	12m 10s
build (gcc-debug-shared, ubuntu-22.04)	7m 3s
build (gcc-debug-noexcept, ubuntu-22.04)	7m 2s
build (macos-release, macos-13)	6m 44s
build (win64-release, windows-latest)	10m 32s
build (win64-debug-shared, windows-latest)	8m 48s
build (win64-debug-noexcept, windows-latest)	7m 52s
	2h 13m 11s

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