REST API: Introduce Autosaves controller and endpoint.
- Adds
WP_REST_Autosaves_Controller which extends WP_REST_Revisions_Controller.
- Autosaves endpoint is registered for all post types except
attachment because even post types without revisions enabled are expected to autosave.
- Because setting the
DOING_AUTOSAVE constant pollutes the test suite, autosaves tests are run last. We may want to improve upon this later.
Props adamsilverstein, aduth, azaozz, danielbachhuber, rmccue.
Fixes #43316.