HTTP chunked transfer encoding can have lots of chunks, and calling the data dissector for each individual chunk adds a large number of layers to the frame and doesn't really make sense. (As opposed to calling the data dissector on the reassembled data if we can't handle the content type, which does make sense.) In particular, this can cause a failed assertion by adding more layers than PINFO_LAYER_MAX_RECURSION_DEPTH. Just add each data chunk as a FT_BYTES item. Fix #18130.