Definition based extraction: Issue in the extension url using ProfileLoader

[vbothe23]

Describe the bug
When using structure-definition-based-extraction with ProfileLoader, the extension URL in the resource should be same as it's profile URL, rather than the definition URL mentioned in the Questionnaire.

Component
SDC library

To Reproduce
Steps to reproduce the behavior:

1. Use below json as a questionnaire string.

{
         "resourceType": "Questionnaire",
         "extension": [
           {
             "url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext",
             "valueExpression": {
               "language": "application/x-fhir-query",
               "expression": "Patient",
               "name": "patient"
             }
           }
         ],
         "item": [
           {
             "linkId": "1",
             "definition": "http://fhir.org/guides/who/core/StructureDefinition/who-patient#Patient.birthTime",
             "text": "Time of birth",
             "type": "dateTime"
           }
         ]
       }

2. Use below json as a questionnaireResponse string.

{
          "resourceType": "QuestionnaireResponse",
          "item": [
            {
              "linkId": "1",
              "answer": [
                {
                  "valueDateTime": "2022-02-07T13:28:17-05:00"
                }
              ]
            }
          ]
        }

3. Perform extraction using profileLoader.

ResourceMapper.extract(
        questionnaire = questionnaireWithBirthTimeExt,
        questionnaireResponse = questionnaireResponseWithBirthTimeExt,
        profileLoader = ProfileLoaderImplWithExt(mContext),
      )

Profile for Patient Birth-time extension

{
        "id": "Patient.extension:birthTime",
        "path": "Patient.extension",
        "sliceName": "birthTime",
        "min": 0,
        "max": "1",
        "type": [
          {
            "code": "Extension",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/patient-birthTime"
            ]
          }
        ],
        "mustSupport": true
      }

Expected behavior
Extracted Patient resource should contain the extension with URL http://hl7.org/fhir/StructureDefinition/patient-birthTime
But URL in the extension is http://fhir.org/guides/who/core/StructureDefinition/who-patient#Patient.birthTime

Additional context
https://fhir-ru.github.io/extension-patient-birthtime.html

[dubdabasoduba]

https://hl7.org/fhir/R4B/extension-patient-birthtime.html