JIRA integration REST API is missing `jira_transition_id` in responses

The responses of the JIRA integration REST API are incomplete. For example it's missing the jira_transition_id field.

Steps to Reproduce

The following curl command:

curl -X PUT "http://localhost:8080/api/v4/projects/71/services/jira" --header "PRIVATE-TOKEN: ACCTEST1234567890123" --header 'Content-Type: application/json' --data '{                                                        
 "url": "https://testurl.com",
 "api_url": "https://testurl.com/rest",
 "project_key": "",
 "username": "user2",
 "password": "mypass_update",
 "jira_issue_transition_id": "3",
 "merge_requests_events": true
}'

... returns:

{
  "id": 29,
  "title": "Jira",
  "slug": "jira",
  "created_at": "2022-05-15T15:23:14.883Z",
  "updated_at": "2022-05-15T15:23:14.883Z",
  "active": true,
  "commit_events": false,
  "push_events": true,
  "issues_events": true,
  "confidential_issues_events": true,
  "merge_requests_events": true,
  "tag_push_events": true,
  "note_events": true,
  "confidential_note_events": true,
  "pipeline_events": true,
  "wiki_page_events": true,
  "job_events": true,
  "comment_on_event_enabled": true,
  "properties": {
    "url": "https://testurl.com",
    "api_url": "https://testurl.com/rest",
    "username": "user2"
  }
}

Observed Behavior

The jira_transition_id field is nowhere to be found in the response. Neither in the response to the create endpoint nor in the response of the get endpoint.

Expected Behavior

The jira_transition_id should be part of those responses. Probably as part of the properties object.

Impact

The Terraform GitLab Provider currently has a buggy resource due to this behavior.

/cc @nagyv-gitlab could you help me to find the appropriate team to help out here?