We currently do not serialize properly the namespace for the CursorResponse object.

We need to make use of the NamespaceStringUtil::serialize everywhere we parse the NamespaceString in order not to drop the tenantId prefix from a namespace.

There is the cursor_response_test.cpp file that can be used to test the changes. We can look at the roundTripThroughCursorResponseBuilderWithPartialResultsReturned for inspiration on how to test this.