Prefix codes eq, ne, gt, lt, ge, le are not working in chained search.

[indiwarjha]

Describe the bug
When using chained search, none of the prefix codes (eq, ne, gt, lt, ge, le etc.) are working when we do a chained search.

To Reproduce
Steps to reproduce the behavior:

1. Create multiple Patient resources (few with birthdate less than 1974-12-25)
2. Create a number of DiagnosticReport resources and link these to the Patient resources created in step 13.
3. Send the request: https://localhost:44305/fhir/DiagnosticReport?subject:Patient.birthdate=ge1974-12-25
4. All the DiagnosticReport resources present in the database are returned

Expected behavior
Only those DiagnosticReport resources should be returned which satisfy the condition: subject:Patient.birthdate=ge1974-12-25

Spark version

• latest version on r4/master branch

Operating system + Database

• OS: Windows 11 Enterprise
• Database: MongoDB