Change DataHeader alias filtering to using aliases from the first DH
Do not filter out AuxContainer aliases, but write all StoreGate aliases from the first Event and ignore later changes. (This is what anyhow happens during merging)
This fixes test failures reported in !45042 (merged) and still prevents unnecessary replication of DataHeaderForms. Follow up (and a fix) to the original alias filtering introduced in !44905 (merged)