[JIRAALIGN-1651] API 2.0: Teams request is not returning children for Programs/Portfolios user is assigned to

Issue Summary

APi 2.0: Teams request is not returning children for Programs/Portfolios user is assigned to

Steps to Reproduce

1. Login. 
2. Create a User with enabled Program and Portfolio teams toggles. 
3. USer should be assigned to several Portfolio and Program Teams. 
4. Go to API 2.0.
5. Send GET for Teams. 
6. Check the response. 

Expected Results

A list of teams is equal to what users see in the UI. It includes All Portfolio, Program, and Agile/Kanban Teams user s assigned to. And it includes all child teams for Portfolios and Programs the user is assigned to. 
a) if API user is assigned to Portfolio, all Programs + Agile/Kanban/other child teams are returned along with Portfolio and Program team, b) if API user is assigned to Program, all Agile/Kanban/other child teams are returned along with Program team, c) if API user is assigned to Agile/Kanban/other child teams, then only the Agile/Kanban/other child teams are returned.

Actual Results

A list includes only Teams user is directly assigned to.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available