[DOC] [APIM] [3.2.0] Update the Response details of developer portal rest API list application details

Description:
In APIM 3.2.0 (latest WUM update), when we use the developer rest API method [1] to list application details for a given application, we could observe that the response does not include the application key details.

Sample request

curl -k -H "Authorization: Bearer <Access_TOKEN>" "https://localhost:9443/api/am/store/v1/applications/054031a7-032a-4d7b-9998-0d0f6f67c72d/oauth-keys" -v

Sample Response

{"applicationId":"054031a7-032a-4d7b-9998-0d0f6f67c72d","name":"sample","throttlingPolicy":"10PerMin","description":"","tokenType":"JWT","status":"APPROVED","groups":[],"subscriptionCount":0,"keys":[],"attributes":{},"subscriptionScopes":[],"owner":"admin","hashEnabled":false}

As per the documentation [1], It mentioned that the response of the request should include an array of objects (Application key details).

Further, when analyzing the implementation [2] we could observe that we have not implemented to set keys for the applicationKeyDTOs object. And further, as per comment [3], we could observe that it is in the Todo list.

Since we cannot cater to the above requirement via WUM update as it might break clients when parsing responses. We can fix the OAS used in the documentation and remove the empty field and update the documentation [1] properly with the correct list of fields which should be available in the API response.

Suggested Labels:
APIM , 3.2.0

Suggested Assignees:
@Mariangela

Affected Product Version:
3.2.0

[1] [1] https://apim.docs.wso2.com/en/3.2.0/develop/product-apis/devportal-apis/devportal-v1/devportal-v1/#tag/Applications/paths/~1applications~1{applicationId}/get
[2] https://github.com/wso2/carbon-apimgt/blob/master/components/apimgt/org.wso2.carbon.apimgt.rest.api.store.v1/src/main/java/org/wso2/carbon/apimgt/rest/api/store/v1/mappings/ApplicationMappingUtil.java#L66
[3] https://github.com/wso2/carbon-apimgt/blob/master/components/apimgt/org.wso2.carbon.apimgt.rest.api.store.v1/src/main/java/org/wso2/carbon/apimgt/rest/api/store/v1/mappings/ApplicationMappingUtil.java#L66