Reduce all uses of Unstructured to the simpler form, and avoid asking
for mapper or typer unless it is required. Use Typed() for places that
previously used VersionedObject, and remove paths for versioned objects
from code that is now using unstructured.
Moves DisabledClientMapperForMapping wrapper to new Local attribute.
Removes Factory#NewUnstructuredBuilder in favor of new Unstructured
builder attribute.