doc: remove all references to internal AbortError
This resolves issues around the use of an internal AbortError and better aligns node towards where AbortController / AbortSignal is headed.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This resolves issues around the use of an internal AbortError and better aligns node towards where AbortController / AbortSignal is headed.