[Internal] [Feature] Make these custom field validations "smarter"

[jessicarowell]

Implement this alongside adding support for additional Biosample packages.
Give some user control of field requirements and content rules.

Right now custom field functions coerce data types, replace empty fields with something user-specified, and replace a field name if the user specifies.

Place an ❌ in a Box that Best Matches the Feature's Importance:

• [] 1 - Most important (absolutely integral and will not use codebase at all without it)
• [] 2-4 - Moderate (still using codebase for other functions but is serving as a blocker for future use-cases)
• 5 - Least important (would like to see but there are no stringent expectations nor urgency for current/future use-cases) 

Any Additional Context or Information? Has There Been Any Progress Made So Far Towards this Request? Any Helpful Resources to Reference? Screenshots or Links?