Manage name changes (prefix/suffix) via YAML annotations rather than via in-memory-only fields.

plugin/builtin/namespacetransformer/NamespaceTransformer.go

@@ -38,6 +38,7 @@ func (p *plugin) Transform(m resmap.ResMap) error {
 			// Don't mutate empty objects?
 			continue
 		}
+		r.SetOriginalNs(r.GetNamespace(), false)
 		err := r.ApplyFilter(namespace.Filter{
 			Namespace: p.Namespace,
 			FsSlice:   p.FieldSpecs,