Resolve custom data elements on Funder

[martha]

Description

Summary of changes: The Funder schema object already has custom data elements in the API, but we weren't previously resolving them, so a saved CDE wouldn't appear correctly in the form.

Relates to hmis-warehouse PR: greenriver/hmis-warehouse#6432 (no dependency, can be merged independently)

How to test: Save a CDE on a Funder record, then reopen the form. The CDE should be populated in the form.

Type of change

Fix to a non-presenting bug (no existing Funders collect CDEs)

Checklist before requesting review

• I have performed a self-review of my code
• I have run the code that is being changed under ideal conditions, and it doesn't fail
• I have used Axe DevTools to scan for accessibility issues (or not applicable)
• My code includes comments and/or descriptive variable names to help other engineers understand the intent (or not applicable)
• My code follows the style guidelines of this project (eslint)
• I have updated the documentation (or not applicable)
• If it's not obvious how to test this change, I have provided testing instructions in this PR or the related issue