* Waterbox setup has been revamped to use the latest llvm parts (llvm 16 for compiler_rt/libunwind/libcxx/libcxxabi).
* Clang is now possible to use, and is the preferred compiler (due to superior performance).
* Supported compilers are now clang 14/15/16, and gcc 12.
* Other core updates are mixed in.
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Co-authored-by: Morilli <35152647+Morilli@users.noreply.github.com>