[ConstantRange] Add isWrappedSet() and isUpperSignWrapped()

[ConstantRange] Add isWrappedSet() and isUpperSignWrapped()

Split off from D59749. This adds isWrappedSet() and
isUpperSignWrapped() set with the same behavior as isSignWrappedSet()
and isUpperWrapped() for the respectively other domain.

The methods isWrappedSet() and isSignWrappedSet() will not consider
ranges of the form [X, Max] == [X, 0) and [X, SignedMax] == [X, SignedMin)
to be wrapping, while isUpperWrapped() and isUpperSignWrapped() will.

Also replace the checks in getUnsignedMin() and friends with method
calls that implement the same logic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@357112 91177308-0d34-0410-b5e6-96231b3b80d8