access_output/srt: obsolete SRT_PARAM_CHUNK_SIZE

It's the same thing as SRT_PARAM_PAYLOAD_SIZE.

(cherry picked from commit c90ef66a) (edited)
edited:
* 3.0 doesn't have struct typedefs
* 3.0 has advanced parameter in some settings

Signed-off-by: Steve Lhomme <robux4@ycbcr.xyz>