Copy Status Flag is_available not respected by search results

EG 3.3.4

It doesn't seem like the 3.0 search rewrite ("Eliminate staged search" Bug #1698206) included support for the is_available copy status flag.

Steps to reproduce:
1. I added the is_available flag to our local "On Display" copy status.

2. I selected a title with just one available copy, that shows up when I search with the "Limit to available" checkbox selected.

3. I changed the status of that one copy to "On Display".

4. A repeated search doesn't pull up the title anymore.

It appears that OpenILS/Application/Storage/Driver/Pg/QueryParser.pm has a hard coded list of '{0,7,12}' for status availability testing.
https://git.evergreen-ils.org/?p=Evergreen.git;a=blob;f=Open-ILS/src/perlmods/lib/OpenILS/Application/Storage/Driver/Pg/QueryParser.pm;h=950a081b63a30b9c0889dbc3ef27fff51150abe7;hb=HEAD#l1032

It looks like the is_available logic (bug #1464709) was added to metabib.pm but wasn't moved over to QueryParser.pm when the rewrite happened.

Josh