[clang] [RISCV] Disable generation of asynchronous unwind tables for RISCV baremetal (PR #81727)

[Garvit Gupta via cfe-commits]

quic-garvgupt wrote:

Hi @asb, I do not have write access,  requesting to merge this PR on my behalf. Also, requesting to backport this PR onto the release  branch. Thanks in advance!

https://github.com/llvm/llvm-project/pull/81727