Acknowledge different canonical serialization of some auxiliary metadata

It seems like ledger changed some metada encoding between versions. We
had some specific auxiliaryData re-encoding fail, while most of the
golden data was roundtripping just fine. We suspect a slight difference
in the "canonical" serialization produced by the ledger **iff** a data
type was not serialized before. Which is the case in our golden test
suite where we generated random values and serialize them.

TLDR; our golden tests are quite strict and this should be fine