[DAG] Allow XOR(X,MIN_SIGNED_VALUE) to perform AddLike folds

As raised on PR52267, XOR(X,MIN_SIGNED_VALUE) can be treated as ADD(X,MIN_SIGNED_VALUE), so let these cases use the 'AddLike' folds, similar to how we perform no-common-bits OR(X,Y) cases.

define i8 @src(i8 %x) {
  %r = xor i8 %x, 128
  ret i8 %r
}
=>
define i8 @tgt(i8 %x) {
  %r = add i8 %x, 128
  ret i8 %r
}
Transformation seems to be correct!

https://alive2.llvm.org/ce/z/qV46E2

Differential Revision: https://reviews.llvm.org/D122754