Folders support to Cloud Analytics Reports and Allocations

We are adding support for organizing reports and allocations into folders.

To support this we have added the ability to:

• Filter reports and allocations by folderId.
• Add a report or allocation to an existing folder by including folderId in a PATCH request. If folderId is omitted or empty, the item is placed in the root folder.

It is optional to use the folderId. Folders can be created and configured using the Folders API.