Resolve #3498085 Move the addition of the article content type xb field into a submodule

Closes #3498085

.tugboat/config.yml

@@ -50,6 +50,7 @@ services:
           # Enable the module.
           vendor/bin/drush --yes pm:install \
             experience_builder \
+            xb_dev_standard \
             media_library \
             components