Summary: Refactoring in preparation for parsing strings from the API. The plan is that the API code will only need to do a server-side version of the code in ViewFieldRec.valueParser (minus ReferenceUtils) which is quite minimal.
Test Plan: Nothing extra here, I don't think it's needed. This stuff will get tested more in a future diff which changes the API.
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D3164