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

[Bruno Cardoso Lopes via cfe-commits]

bcardosolopes 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, hey will probably be gone soon, see  https://github.com/llvm/llvm-project/pull/227520 / the comment there.

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