Merge llvm-project release/16.x llvmorg-16.0.3-0-gda3cd333bea5
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-16.0.3-0-gda3cd333bea5 (aka 16.0.3 release).
PR: 271047
MFC after: 1 month
(cherry picked from commit cbe9438cfe07adfbcdeafe8e363614f83b03a055)