[mlir][vector] Improve lowering to LLVM for `minf`, `maxf` reductions

This patch improves the lowering by changing target LLVM intrinsics from
`reduce.fmax` and `reduce.fmin`,
which have different semantic for handling NaN,
to `reduce.fmaximum` and `reduce.fminimum` ones.

Fixes #63969

Depends on D155869

Reviewed By: dcaballe

Differential Revision: https://reviews.llvm.org/D155877