Form Element always keeps value of SingleSelect or MultiSelect irrespective of whether the associated concepts data type is coded or not

**Describe the bug**
Form Element always keeps value of SingleSelect or MultiSelect irrespective of whether the associated concepts data type is coded or not

**To Reproduce**
Steps to reproduce the behavior:
Run this query:
select form_element.type from form_element
join concept c2 on form_element.concept_id = c2.id
where c2.data_type = 'Numeric';

**Expected behavior**
This value should be null for non-coded fields

**Developer Checklist**
Developer fixing the bug should fill this checklist.
- [ ] Does the fix require extensive regression testing?
- [ ] Are you mentioning the required scenarios that could be affected?

No source file or test is named. Start by running the supplied SQL query and tracing the Java/Spring Boot handling of form_element.type with the joined concept data_type. Done means SingleSelect and MultiSelect values are null for non-coded concepts such as Numeric, while coded concepts retain their values, with regression coverage for both cases.

Written by the indexing model from the issue text.