[clang] [clang][OpenMP] Mark all SIMD regions as non-throwing (PR #100162)

[Krzysztof Parzyszek via cfe-commits]

kparzysz wrote:

Linux failure went away, but a Windows issue was introduced upstream in the meantime.  None of that has to do with this PR.

https://github.com/llvm/llvm-project/pull/100162