WL#12620: Deprecate (5.7) and remove (8.0) resolveip

Deprecate the resolveip utility in 5.7 and remove it in 8.0.

The resolveip utility resolves host names to IP addresses and vice versa. 

This utility was used by the mysql_install_db script which was removed in 5.7
(and replaced by a C++ program, which again was removed in 8.0).

Hence resolveip no longer serves any useful purpose. The functionality is
available with standard Unix commands in any case.