Assign compliance framework to project via API

Proposal

There is currently no way to programmatically assign a compliance framework to a project. This has been requested on a couple of occasions since it launched. !34709 (comment 597931636)

This is Stuff that should Just Work but was missed out during initial development as the assignment is done using an existing Rails controller.

Implementation Plan

• Create new GraphQL mutation to assign a compliance framework to a project. backend