[boost] [modularization] Moving <boost/math/common_factor_ct.hpp> to TypeTraits

Hi, |moving boost/math/common_factor_ct.hpp to TypeTraits would remove the dependency from Interprocess, Pool and Variant to Math. | /interprocess/ <http://www.pdimov.com/tmp/report-6d1f271/interprocess.html> |<boost/math/common_factor_ct.hpp>| * from |<boost/interprocess/allocators/detail/node_pool.hpp>| /pool/ <http://www.pdimov.com/tmp/report-6d1f271/pool.html> |<boost/math/common_factor_ct.hpp>| * from |<boost/pool/pool.hpp>| /variant/ <http://www.pdimov.com/tmp/report-6d1f271/variant.html> |<boost/math/common_factor_ct.hpp>| || * from |<boost/variant/variant.hpp>| Vicente