[clang] [RISCV] Merging RISCVToolChain and BareMetal toolchains (PR #118809)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

> I think this change could be made a lot smaller by doing a clean up first, bringing the BareMetal driver closer to other drivers, before attempting to merge the RISCVToolChain driver into it.

Could you describe in a bit more detail which bits you think need to be cleaned up?  Or are you planning to push additional changes yourself in the near future?  This is a little vague.  (We don't want this to be blocked indefinitely.)

https://github.com/llvm/llvm-project/pull/118809