collection_mutation: generalize collection_mutation_view_description::materialize to UDTs.
collection_mutation: generalize collection_mutation_view_description::materialize to UDTs.

avikivity/scylla,scylladb/scylla,avikivity/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla