Delete OTLP destination by ID or name

Delete an OTLP destination. Sessions bound to it are still exporting, so the delete is refused with a 409 while any exist; either wait for those sessions to end or delete them first. It is refused the same way while a managed auth connection still selects it, because that connection re-resolves the destination on every login, and while a managed auth login using it is still in progress. Requires an organization-scoped credential or dashboard authentication; project-scoped credentials receive a 403.