libstdc++: Improve diagnostics for misuses of output iterators

This adds deleted overloads so that the errors for invalid uses of
std::advance and std::distance are easier to understand (see for example
PR 102181).

libstdc++-v3/ChangeLog:

	* include/bits/stl_iterator_base_funcs.h (__advance): Add
	deleted overload to improve diagnostics.
	(__distance): Likewise.