Add new term "Biochemical progression" to relapse_type field

[hknahal]

Implementation:

Based on discussions with MOH Clinical Committee and ARGO CMD Working Group, a new term "Biochemical progression" will be added to the relapse_type field in the Follow Up schema for prostate cancer. This will require a validation check that permits anatomic_site_progression_or_recurrence field to not be submitted because biochemical progression is not related to a specific site and is a (blood) test done to assess disease status in prostate cancer

[puneet-oicr]

Almost ready