Replace Boston College collection's 3D metadata block with metadata block that ships with Dataverse software

[jggautier]

We'll be adding to the metadata blocks that ship with Dataverse a metadata block for describing 3D data. See IQSS/dataverse#11120.

After that's done, we'll need to replace the "custom3d.tsv" metadata block that's been used by folks who manage one of Boston College's collection with that metadata block that ships with the Dataverse software.