fix inductor clamp decomp to correctly type promote and avoid wrappin… (#94157)
…g scalars
Fixes #93784, #93225
Ideally, clamp decomp should live in refs or _decomp, but this reversed our current decomposition flow of `clamp_min` -> `clamp` -> lowering, so to keep changes to minimum, I'm leaving it in inductor for now.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94157
Approved by: https://github.com/ezyang
