`override_feature_check` and `override_feature_checks` are two handy methods that allow enabling or disabling features for unit testing. Until now, they've been implemented solely as context managers. This meant adding an additional layer of indentation for tests that needed to wrap everything inside of them. This change rewrites these two as classes which inherit from `django.test.utils.TestContextDecorator`. This allows these to be used either as a context manager or as a decorator. Testing Done: - Ran unit tests. - Used these in decorator form elsewhere.