Add more CI to GW-CI

[DavidNew-NOAA]

This PR is a companion to #1365. It adds test reference blocks to the YAMLs for the JEDI-to-FV3 increment converters.

[RussTreadon-NOAA]

Approve

[danholdaway]

In jcb-algorithsm the if looks like:

{% if test_reference_filename is defined %}

whereas the changes here are using

{% if do_testing %}

Why not use the same logic that's in jcb-algorithms in jcb-gdas/algorithms?

[DavidNew-NOAA]

jcb-algorithms PR #7 changed the logic in that repo as well. I used do_testing so I can set it in the JCB base yaml, which can be modified via theconfig.base in the GW, which in turn can be modified via the config YAMLs for the CI tests.

Before, test_reference_filename was only set in the JCB algorithm YAMLs for the jjob tests in GDASApp. If I put the same thing the primary JCB algorithm YAMLs in GDASApp, testing would always be turned on. I needed a way to turn it on and off. See the companion GDASApp PR #1365