devel/boost: update to 1.89.0 release (+)

Major change:
Boost::system component which converted to header-only since 1.70.0,
stops providing an empty stub library libboost_system.so for compatibe reasons
and goes as pure header-only since 1.89.0.
All consumers must be adjusted.

Release notes: https://www.boost.org/releases/1.89.0/