Improving the fork sync function to include newly created branches

Problem Definition

Forked repo can't be synced with main repo if we create a new branch in the main repo AFTER we do the fork.

The option of deleting forked repo and re-forking (even if it creates all the branches of our main repo to the team account) is not a viable solution
because:

1. We again have this problem in the future if we added new release branch on our main repo. Then we have to keep deleting the forked repository from the account.
2. We are using issue tracker on forked repo to manage issues and we can't afford to loose all issues and discussions around them in team accounts just because a new branch is added to the main repo.

Resolution Suggested

Improve the Fork Sync feature to allow forked repository to sync newly created branch on the main repository

(BBS-44781)