[CMake] Propagate Boost.Iostreams to all modules

The opm-benchmark module uses the Boost.Iostreams component to handle (GZip) compressed input streams.  In order to have a uniform set of Boost components across all OPM modules (see rationale in commit ac61cde), this necessitates searching for all components in all `*-prereqs.cmake` files.

Furthermore, we uniformly raise the minimum Boost requirement to version 1.44 to reflect the requirements of the opm-parser.

This is a stepping stone towards creating a single source for the OPM build system.