Split sanitize and normalize to be separate operations

[janette]

21640

WIP: Fixes applying date formats when using data dictionaries and the streamed CSV download API

Describe your changes

We only want to sanitize expressions, not when adding fields to the query.

QA Steps

• [ ] TBD

Checklist before requesting review

If any of these are left unchecked, please provide an explanation

• [ ] I have updated or added tests to cover my code
• [ ] I have updated or added documentation