As of the MR https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2575 gst_h265_decoder_process_sps() is called per slice and it causes noisy debug message print. Reorganize related and the other debug printings at once. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2915>