Write failing spec for updating sponsor affiliation & type
Make affiliation-related attributes readonly in sponsor
Introduce sponsor validation for affiliation attributes & refactor sponsor_spec
Fix failing sponsorship_step
Validate affiliations on create only; update dev seeds to be valid
Fix dev seeds again; fix sponsors factory; refactor sponsor_spec
Disable SponsorType, Branch & Organization inputs for persisted sponsors; create scenarios; OSRA-209 #Code-Review