Overhaul the filterability of packet-ansi_683.c

It's (ab)use of proto_tree_add_text was "hidden" behind a single FT_NONE hf item, that effectively had the same behavior of proto_tree_add_text, but wouldn't show up in checkAPIs.pl.  Replaced the (over 200+) proto_tree_add_none_format calls with proto_tree_add_text and then ran convert_proto_tree_add_text.pl on the dissector.  That started the cleanup, and I did more while in the neighborhood.

Change-Id: I89e09cf23e8998bcc9197f9a4043e1fc2850fc8c
Reviewed-on: https://code.wireshark.org/review/4521
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>