libstdc++: Fix zip_view's operator- for integer-class difference type [PR106766]

libstdc++: Fix zip_view's operator- for integer-class difference type [PR106766]

The difference type of an underlying iterator could be an integer-class
type, which make_unsigned_t doesn't handle, so we need to use the more
general __make_unsigned_like_t / __to_unsigned_like here instead.

	PR libstdc++/106766

libstdc++-v3/ChangeLog:

	* include/std/ranges (zip_view::_Iterator::operator-): Use
	__to_unsigned_like instead of make_unsigned_t.
	(zip_view::_Sentinel::operator-): Likewise.
	* testsuite/std/ranges/zip/1.cc (test04): New test.