gh-143006: Fix and optimize mixed comparison of float and int (GH-143084)

gh-143006: Fix and optimize mixed comparison of float and int (GH-143084)

When comparing negative non-integer float and int with the same number
of bits in the integer part, __neg__() in the int subclass returning
not an int caused an assertion error.

Now the integer is no longer negated. Also, reduced the number of
temporary created Python objects.