Investigate ingestion of HTAN related data

[fedorov]

It is currently impossible (from what I know) to figure out what data is accompanying HTAN images stored in IDC. We have image-related data for CPTAC, TCGA and other collections. I do not see reasons not to follow the same approach for HTAN. We should investigate this.

[fedorov]

This is also tracked in the internal issue here: https://github.com/ImagingDataCommons/IDC-ProjectManagement/issues/1562.

[G-White-ISB]

Added for v16. I copied clinical data from the isb-cgc BigQuery tables for only those cases we currently have in IDC