UserGroup.Suggestion does not return subgroups

1. create a group mygroup1
2. create a group mysubgroup1
3. create a user myuser1
4. add subgroup1 as a member of mygroup1
5. add myuser1 as a member of mygroup1
6. Try the following curl command:

   curl -fsSL -u Administrator:Administrator -H "Content-Type: application/json+nxrequest" -X POST https://nightly.nuxeo.com/nuxeo/site/automation/UserGroup.Suggestion -d '{"params":{"groupRestriction":"mygroup1"},"context":{}}'
   [
     {
       "firstName": "myuser1",
       "lastName": "myuser1",
       "tenantId": null,
       "groups": [],
       "company": "",
       "email": "myuser1@aze.ert",
       "username": "myuser1",
       "id": "myuser1",
       "entity-type": "user",
       "type": "USER_TYPE",
       "prefixed_id": "user:myuser1",
       "displayLabel": "myuser1 myuser1",
       "displayIcon": true
     }
   ]
   

   Only the users are returned.

7. this is due to the following part of code:
   https://github.com/nuxeo/nuxeo/blob/10.10/nuxeo-features/nuxeo-automation/nuxeo-automation-features/src/main/java/org/nuxeo/ecm/automation/core/operations/users/SuggestUserEntries.java#L151
   Once the group restriction is set, the search type is thus ignored.

Expected behavior: to match the usual behavior, if no searchType is specified both users and groups/subgroups should be returned.