Get child pages should return properties and children

Issue Summary

Not possible to retrieve properties and child from the Get child pages V2 API

Steps to Reproduce

1. Use the V1 to get the properties and children using  /wiki/rest/api/content/${contentId}/child/page?limit=200&expand=metadata.properties,childTypes.page
2. Perform the same with V2 API using Get child pages

Expected Results

The V2 API returns results similar with V1 endpoint with expands parameter

Actual Results

The V2 API is not able to return the page properties or children page

Workaround

Need to use two APIs - one to get page properties and another to know if the page has children in order to achieve the same when using V1 API with expand parameter