update logging setup to respect json setting (#13216)

* fix json_log to ensure we really only log json

* also control gunicorn

* reduce noise in action

.github/workflows/qc_checks.yaml

@@ -22,6 +22,7 @@ env:
   INVENTREE_BACKUP_DIR: /home/runner/work/InvenTree/test_inventree_backup
   INVENTREE_SITE_URL: http://localhost:8000
   INVENTREE_DEBUG: true
+  INVENTREE_GUNICORN_ACCESS_LOG: false
 
 permissions:
   contents: read