When 'parent' is set as the path argument name, it gets passed down through to the `create_item()` method and can erroneously reset the 'parent' value on the post itself. Instead, we rename the argument to 'id' and replicate the revision controller's `get_items_permissions_check()` to instead reference 'id'.
Also ensures revision query params (of which there are many) aren't exposed as the query params for autosaves (of which there are two).
Props TimothyBlynJacobs.
See #43316.
Built from https://develop.svn.wordpress.org/branches/5.0@43897
git-svn-id: http://core.svn.wordpress.org/branches/5.0@43729 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* 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.
Built from https://develop.svn.wordpress.org/branches/5.0@43768
git-svn-id: http://core.svn.wordpress.org/branches/5.0@43597 1a063a9b-81f0-0310-95a4-ce76da25c4cd
danielbachhuber