Make tuple comparison hints mandatory

There isn't much point in having separate versions of tuple comparators
that don't take tuple comparison hints anymore, because all hot paths
have been patched to use the hinted versions. Besides un-hinted versions
don't make sense for multikey indexes, which use hints to store offsets
in multikey arrays. Let's strip the _hinted suffix from all hinted
comparators and zap un-hinted versions. In a few remaining places in the
code that still use un-hinted versions, let's simply pass HINT_NONE.