[clang] [clang][OpenMP] Propoagate debug location to OMPIRBuilder reduction codegen (PR #100358)

[Akash Banerjee via cfe-commits]

https://github.com/TIFitis approved this pull request.

Thanks for the fix. LGTM.

I've also added some changes in #100364 which should fix some other places where debug info was being incorrectly propagated.

https://github.com/llvm/llvm-project/pull/100358