Move hpb::internal::CreateMessage to hpb::interop::upb::CreateMessage

PiperOrigin-RevId: 666438557
diff --git a/hpb_generator/gen_repeated_fields.cc b/hpb_generator/gen_repeated_fields.cc
index 7b6263a..ca7f732 100644
--- a/hpb_generator/gen_repeated_fields.cc
+++ b/hpb_generator/gen_repeated_fields.cc
@@ -135,7 +135,7 @@
           size_t len;
           auto* ptr = $3_$5(msg_, &len);
           assert(index < len);
-          return ::hpb::internal::CreateMessage<$4>(
+          return ::hpb::interop::upb::MakeCHandle<$4>(
               (upb_Message*)*(ptr + index), arena_);
         }
       )cc",