[mlir][arith] Add LLVM lowering for `maxnumf`, `minnumf` ops (#66431)

This patch is part of a larger initiative aimed at fixing floating-point
`max` and `min` operations in MLIR:
https://discourse.llvm.org/t/rfc-fix-floating-point-max-and-min-operations-in-mlir/72671.
    
The commit addresses the task 1.4 of the RFC by adding LLVM lowering to
the corresponding LLVM intrinsics.
    
Please **note**: this PR is part of a stack of patches and depends on
#66429.