[DAGCombiner] Change foldAndOrOfSETCC() to optimize and/or patterns with floating points.

CMP(A,C)||CMP(B,C) => CMP(MIN/MAX(A,B), C)
CMP(A,C)&&CMP(B,C) => CMP(MIN/MAX(A,B), C)

If the operands are proven to be non NaN, then the optimization can be applied
for all predicates.

We can apply the optimization for the following predicates for FMINNUM/FMAXNUM
(for quiet and signaling NaNs) and for FMINNUM_IEEE/FMAXNUM_IEEE if we can prove
that the operands are not signaling NaNs.
- ordered lt/le and ||
- ordered gt/ge and ||
- unordered lt/le and &&
- unordered gt/ge and &&

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D155267