get_comment_statuses() - does not contain the "Trash" comment status

[tyxla]

The get_comment_statuses() function is expected to retrieve all of the available comment statuses, however it does not return the trash status.

[tyxla]

Adding the trash comment status to the output of get_comment_statuses()

[rachelbaker]

I agree that trash being omitted from the returned values of get_comment_statuses() is misleading. get_comment_statuses() was created, and is only internally used, to provide comment_statuses for the XMLRPC wp.editComment endpoint. I believe the reason trash was left off the returned values here is that they don't include handling for trashing, or editing and trashing comments.

If this ticket is going to move forward the logic in wp_xmlrpc_server::wp_editComment() will also need a refresh, and test coverage.

[rachelbaker]

Related #20977

[wonderboymusic]

In 34524:

Comments: In get_comment_statuses(), also return trash.
XML-RPC: In wp_xmlrpc_server::wp_editComment(), allow comments to be trashed.

Introduce unit tests for wp_editComment in xmlrpc/* #NeverForget

Props tyxla, wonderboymusic.
Fixes #30965.