Decouple MetaData configuration for DAODs

Merged Alaettin Serhan Mete requested to merge amete/athena:master-atlasg-2496 into master

This is yet another follow-up to !61368 (merged). With this MR, each DAOD format now configures its own MetaData instead of doing this in the main skeleton (just like EventData but not quite as flexible yet, which needs a more modular InfileMetaDataCfg but that's another story). It also fixes the bug reported w/ the DAOD_TRUTHX production jobs.

Closes ATLASG-2496

cc: @jcatmore @gemmeren @maszyman

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