UNCLASSIFIED - NO CUI

add preliminary doc section for integration testing

Chris Schaeferrequested to merge
update-devmaint-integration-tests into main

General MR

Summary

Update docs about integration testing for certain changes within package

Relevant logs/screenshots

(Include any relevant logs/screenshots)

Linked Issue

big-bang/bigbang#2168 (closed)

Upgrade Notices

N/A

Merge request reports

UNCLASSIFIED - NO CUI