[clang] [CIR] Support type deduction builder for BinaryFPToFPBuiltinOp (PR #226876)

[via cfe-commits]

aokblast wrote:

> > I can't really understand why these fails with my changes... Let's run with the latest code.
> 
> these are unrelated changes that are hurting us today, they will probably be gone soon, see #227520 / the comment there.

Ah, thanks! I will update branch after your patch get merged.

https://github.com/llvm/llvm-project/pull/226876