Add fields to data model to support QC efforts

[bheavner]

For example, adding field for consent to subject data table could enable QC that the data uploaded is all in the same consent group, and agrees with the DULs applied to the AnVIL workspace

[bheavner]

note: list of NIH consent codes is available on the template IC form (pg 3) - https://osp.od.nih.gov/wp-content/uploads/GDS_Clinical_Specimen_Certification.pdf

[smgogarten]

consent_code is in the participant table. @bheavner can we close this?

[bheavner]

yep!