reproin: don't be a hypocrite --- save **all** the data in DICOMs

[yarikoptic]

in reproin we skip lots of things -- derived data, data we don't know how to convert.

But that makes it impossible from the dump of data in BIDS dataset to be able to come back and possibly convert it later or differently.

We do save scouts in "dicom-only" mode dumping them into sourcedata/ , and I think we should do that for those currently skipped data types as well!

PS a topic of do converting derived data is largely separate but at least this way we would save it.