fix: alter relation loader to use transforms when present

[blueskymonster]

Description of change

Use column transforms when rendering queries during relation loading. Previously, transforms were ignored by the relation loader, causing unexpected values to be put into sql queries.

See #8690 for a description of the expected vs actual behavior. This PR implements the expected behavior.

Fixes #8690

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run lint passes with this change
• npm run test passes with this change. I am struggling to get the test suite running in the first place. I have asked about it in slack.
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change (N/A: this is implementing what I think is the expected behavior. I am of course happy to update docs if there is disagreement on this.)
• The new commits follow conventions explained in CONTRIBUTING.md

[pleerock]

Thank you for contribution! 🎉