thrift: Make with_cob() handle not nothrow move constructible types
thrift: Make with_cob() handle not nothrow move constructible types

raphaelsc/scylla,duarten/scylla,duarten/scylla,avikivity/scylla,kjniemi/scylla,scylladb/scylla,kjniemi/scylla,duarten/scylla,raphaelsc/scylla,scylladb/scylla,scylladb/scylla,raphaelsc/scylla,kjniemi/scylla,scylladb/scylla,avikivity/scylla,avikivity/scylla