Some were leaked when debugging was enabled. Instead just directly use the static strings as-is. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3347>
The error codes not complying with the spec are now notified with the GST_WEBRTC_ERROR_INTERNAL_FAILURE code. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1485>